fix: fix delete logs failed

[fatelei]

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Summary

fix #36120

Screenshots

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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 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	22,026	+22,026
Untyped symbols	0	28,691	+28,691
Modules	0	2551	+2,551

[github-actions]

Pyrefly Diff

base → PR

--- /tmp/pyrefly_base.txt	2026-05-14 03:55:32.061524231 +0000
+++ /tmp/pyrefly_pr.txt	2026-05-14 03:55:18.330540967 +0000
@@ -5953,9 +5953,9 @@
 ERROR Argument `FakeRepo` is not assignable to parameter `workflow_run_repo` with type `APIWorkflowRunRepository | None` in function `services.retention.workflow_run.clear_free_plan_expired_workflow_run_logs.WorkflowRunCleanup.__init__` [bad-argument-type]
    --> tests/unit_tests/services/test_clear_free_plan_expired_workflow_run_logs.py:114:49
 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:385:13
+   --> tests/unit_tests/services/test_clear_free_plan_tenant_expired_logs.py:403:13
 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
+   --> tests/unit_tests/services/test_clear_free_plan_tenant_expired_logs.py:478:13
 ERROR Object of class `FromClause` has no attribute `create` [missing-attribute]
   --> tests/unit_tests/services/test_credit_pool_service.py:19:5
 ERROR Object of class `FromClause` has no attribute `insert` [missing-attribute]