fix: credit pool access outside flask context

[hjlarry]

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Summary

fix #36132

error logs:

Traceback (most recent call last):\n  File \"/app/api/.venv/lib/python3.12/site-packages/graphon/graph/graph.py\", line 161, in _create_node_instances\n    node_instance = node_factory.create_node(node_config)\n                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/app/api/core/workflow/node_factory.py\", line 443, in create_node\n    node_init_kwargs = node_init_kwargs_factories.get(node_type, lambda: {})()\n                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/app/api/core/workflow/node_factory.py\", line 398, in <lambda>\n    BuiltinNodeTypes.LLM: lambda: self._build_llm_compatible_node_init_kwargs(\n                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/app/api/core/workflow/node_factory.py\", line 480, in _build_llm_compatible_node_init_kwargs\n    model_instance = self._build_model_instance_for_llm_node(validated_node_data)\n                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/app/api/core/workflow/node_factory.py\", line 508, in _build_model_instance_for_llm_node\n    model_instance, _ = fetch_model_config(\n                        ^^^^^^^^^^^^^^^^^^^\n  File \"/app/api/core/app/llm/model_access.py\", line 141, in fetch_model_config\n    credentials = credentials_provider.fetch(node_data_model.provider, node_data_model.name)\n                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/app/api/core/app/llm/model_access.py\", line 53, in fetch\n    provider_configurations = self.provider_manager.get_configurations(self.tenant_id)\n                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/app/api/core/provider_manager.py\", line 230, in get_configurations\n    system_configuration = self._to_system_configuration(tenant_id, provider_entity, provider_records)\n                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/app/api/core/provider_manager.py\", line 958, in _to_system_configuration\n    trail_pool = CreditPoolService.get_pool(\n                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/app/api/services/credit_pool_service.py\", line 44, in get_pool\n    with sessionmaker(db.engine, expire_on_commit=False).begin() as session:\n                      ^^^^^^^^^\n  File \"/app/api/.venv/lib/python3.12/site-packages/flask_sqlalchemy/extension.py\", line 709, in engine\n    return self.engines[None]\n           ^^^^^^^^^^^^\n  File \"/app/api/.venv/lib/python3.12/site-packages/flask_sqlalchemy/extension.py\", line 687, in engines\n    app = current_app._get_current_object()  # type: ignore[attr-defined]\n          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/app/api/.venv/lib/python3.12/site-packages/werkzeug/local.py\", line 519, in _get_current_object\n    raise RuntimeError(unbound_message) from None\nRuntimeError: Working outside of application context.\n\nThis typically means that you attempted to use functionality that needed\nthe current application. To solve this, set up an application context\nwith app.app_context(). See the documentation for more information.\n

Screenshots

Before	After
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Checklist

• This change requires a documentation update, included: Dify Document
• I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran make lint && make type-check (backend) and cd web && pnpm exec vp staged (frontend) to appease the lint gods

[github-actions]

Pyrefly Diff

base → PR

--- /tmp/pyrefly_base.txt	2026-05-14 02:35:53.823781109 +0000
+++ /tmp/pyrefly_pr.txt	2026-05-14 02:35:46.203724358 +0000
@@ -3782,29 +3782,29 @@
 ERROR Argument `dict[str, dict[str, str | dict[str, float | list[str]]]]` is not assignable to parameter `config` with type `AppModelConfigDict` in function `core.app.app_config.easy_ui_based_app.model_config.manager.ModelConfigManager.convert` [bad-argument-type]
   --> tests/unit_tests/core/app/test_easy_ui_model_config_manager.py:49:41
 ERROR Object of class `FromClause` has no attribute `create` [missing-attribute]
-   --> tests/unit_tests/core/app/test_llm_quota.py:136:5
+   --> tests/unit_tests/core/app/test_llm_quota.py:147:5
 ERROR Object of class `FromClause` has no attribute `insert` [missing-attribute]
-   --> tests/unit_tests/core/app/test_llm_quota.py:139:13
+   --> tests/unit_tests/core/app/test_llm_quota.py:150:13
 ERROR Object of class `FromClause` has no attribute `create` [missing-attribute]
-   --> tests/unit_tests/core/app/test_llm_quota.py:327:5
+   --> tests/unit_tests/core/app/test_llm_quota.py:338:5
 ERROR Object of class `FromClause` has no attribute `insert` [missing-attribute]
-   --> tests/unit_tests/core/app/test_llm_quota.py:330:13
+   --> tests/unit_tests/core/app/test_llm_quota.py:341:13
 ERROR No matching overload found for function `dict.__init__` called with arguments: (Sequence[Row[tuple[str, int | None]]]) [no-matching-overload]
-   --> tests/unit_tests/core/app/test_llm_quota.py:387:32
+   --> tests/unit_tests/core/app/test_llm_quota.py:398:32
 ERROR Object of class `FromClause` has no attribute `update` [missing-attribute]
-   --> tests/unit_tests/core/app/test_llm_quota.py:398:13
+   --> tests/unit_tests/core/app/test_llm_quota.py:409:13
 ERROR Object of class `FromClause` has no attribute `create` [missing-attribute]
-   --> tests/unit_tests/core/app/test_llm_quota.py:438:5
+   --> tests/unit_tests/core/app/test_llm_quota.py:449:5
 ERROR Object of class `FromClause` has no attribute `insert` [missing-attribute]
-   --> tests/unit_tests/core/app/test_llm_quota.py:441:13
+   --> tests/unit_tests/core/app/test_llm_quota.py:452:13
 ERROR Argument `SimpleNamespace` is not assignable to parameter `model_instance` with type `ModelInstance` in function `core.app.llm.quota.ensure_llm_quota_available` [bad-argument-type]
-   --> tests/unit_tests/core/app/test_llm_quota.py:548:51
+   --> tests/unit_tests/core/app/test_llm_quota.py:559:51
 ERROR Argument `SimpleNamespace` is not assignable to parameter `model_instance` with type `ModelInstance` in function `core.app.llm.quota.ensure_llm_quota_available` [bad-argument-type]
-   --> tests/unit_tests/core/app/test_llm_quota.py:569:51
+   --> tests/unit_tests/core/app/test_llm_quota.py:580:51
 ERROR Argument `SimpleNamespace` is not assignable to parameter `model_instance` with type `ModelInstance` in function `core.app.llm.quota.deduct_llm_quota` [bad-argument-type]
-   --> tests/unit_tests/core/app/test_llm_quota.py:588:28
+   --> tests/unit_tests/core/app/test_llm_quota.py:599:28
 ERROR Argument `SimpleNamespace` is not assignable to parameter `model_instance` with type `ModelInstance` in function `core.app.llm.quota.deduct_llm_quota` [bad-argument-type]
-   --> tests/unit_tests/core/app/test_llm_quota.py:615:28
+   --> tests/unit_tests/core/app/test_llm_quota.py:626:28
 ERROR Argument `SimpleNamespace` is not assignable to parameter `file` with type `File` in function `core.app.workflow.file_runtime.DifyWorkflowFileRuntime.resolve_file_url` [bad-argument-type]
   --> tests/unit_tests/core/app/workflow/test_file_runtime.py:60:39
 ERROR Argument `SimpleNamespace` is not assignable to parameter `graph_init_params` with type `GraphInitParams` in function `core.workflow.node_factory.DifyNodeFactory.__init__` [bad-argument-type]
@@ -5620,13 +5620,13 @@
 ERROR Argument `dict[str, str]` is not assignable to parameter `labels` with type `dict[str, AttributeValue]` in function `enterprise.telemetry.exporter.EnterpriseExporter.record_histogram` [bad-argument-type]
    --> tests/unit_tests/enterprise/telemetry/test_exporter.py:615:85
 ERROR Object of class `FromClause` has no attribute `create` [missing-attribute]
-  --> tests/unit_tests/events/test_update_provider_when_message_created.py:16:5
+  --> tests/unit_tests/events/test_update_provider_when_message_created.py:27:5
 ERROR Object of class `FromClause` has no attribute `insert` [missing-attribute]
-  --> tests/unit_tests/events/test_update_provider_when_message_created.py:21:13
+  --> tests/unit_tests/events/test_update_provider_when_message_created.py:32:13
 ERROR Argument `SimpleNamespace` is not assignable to parameter `sender` with type `Message` in function `events.event_handlers.update_provider_when_message_created.handle` [bad-argument-type]
-  --> tests/unit_tests/events/test_update_provider_when_message_created.py:61:20
+  --> tests/unit_tests/events/test_update_provider_when_message_created.py:72:20
 ERROR Argument `SimpleNamespace` is not assignable to parameter `sender` with type `Message` in function `events.event_handlers.update_provider_when_message_created.handle` [bad-argument-type]
-   --> tests/unit_tests/events/test_update_provider_when_message_created.py:103:20
+   --> tests/unit_tests/events/test_update_provider_when_message_created.py:114:20
 ERROR Cannot index into `object` [bad-index]
    --> tests/unit_tests/extensions/otel/test_celery_sqlcommenter.py:136:20
 ERROR Cannot index into `object` [bad-index]
@@ -5957,13 +5957,13 @@
 ERROR Class member `FixedDateTime.now` overrides parent class `datetime` in an inconsistent manner [bad-override]
    --> tests/unit_tests/services/test_clear_free_plan_tenant_expired_logs.py:460:13
 ERROR Object of class `FromClause` has no attribute `create` [missing-attribute]
-  --> tests/unit_tests/services/test_credit_pool_service.py:17:5
+  --> tests/unit_tests/services/test_credit_pool_service.py:19:5
 ERROR Object of class `FromClause` has no attribute `insert` [missing-attribute]
-  --> tests/unit_tests/services/test_credit_pool_service.py:22:13
+  --> tests/unit_tests/services/test_credit_pool_service.py:24:13
 ERROR Object of class `FromClause` has no attribute `create` [missing-attribute]
-  --> tests/unit_tests/services/test_credit_pool_service.py:55:5
+  --> tests/unit_tests/services/test_credit_pool_service.py:75:5
 ERROR Object of class `FromClause` has no attribute `create` [missing-attribute]
-   --> tests/unit_tests/services/test_credit_pool_service.py:107:5
+   --> tests/unit_tests/services/test_credit_pool_service.py:127:5
 ERROR Argument `SimpleNamespace` is not assignable to parameter `account` with type `Account` in function `services.dataset_service.DatasetService.create_empty_dataset` [bad-argument-type]
    --> tests/unit_tests/services/test_dataset_service_dataset.py:180:93
 ERROR Argument `SimpleNamespace` is not assignable to parameter `account` with type `Account` in function `services.dataset_service.DatasetService.create_empty_dataset` [bad-argument-type]

[github-actions]

Pyrefly Type Coverage

Metric	Base	PR	Delta
Type coverage	0.00%	43.70%	+43.70%
Strict coverage	0.00%	43.22%	+43.22%
Typed symbols	0	22,025	+22,025
Untyped symbols	0	28,690	+28,690
Modules	0	2551	+2,551