fix: fix online_drive is not a valid datasource_type

[fatelei]

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Summary

fix #34439

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 and make type-check (backend) and cd web && npx lint-staged (frontend) to appease the lint gods

[github-actions]

Pyrefly Diff

base → PR

--- /tmp/pyrefly_base.txt	2026-04-02 04:22:04.712012755 +0000
+++ /tmp/pyrefly_pr.txt	2026-04-02 04:21:53.055066559 +0000
@@ -3011,7 +3011,7 @@
 ERROR Cannot index into `str` [bad-index]
    --> tests/unit_tests/core/app/apps/pipeline/test_pipeline_generate_response_converter.py:112:12
 ERROR Class `PipelineRunner` has no class attribute `call_args` [missing-attribute]
-   --> tests/unit_tests/core/app/apps/pipeline/test_pipeline_generator.py:340:12
+   --> tests/unit_tests/core/app/apps/pipeline/test_pipeline_generator.py:341:12
 ERROR Argument `SimpleNamespace` is not assignable to parameter `application_generate_entity` with type `RagPipelineGenerateEntity` in function `core.app.apps.pipeline.pipeline_runner.PipelineRunner.__init__` [bad-argument-type]
   --> tests/unit_tests/core/app/apps/pipeline/test_pipeline_runner.py:65:37
 ERROR Argument `SimpleNamespace` is not assignable to parameter `application_generate_entity` with type `RagPipelineGenerateEntity` in function `core.app.apps.pipeline.pipeline_runner.PipelineRunner.__init__` [bad-argument-type]