fix(fail-branch): prevent streaming output in exception branches

[Nov1c444]

Summary

Prevent streaming output in exception branches.

Screenshots

Before	After

Checklist

Important

Please review the checklist below before submitting your pull request.

• 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 dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods

[Copilot]

Pull Request Overview

A concise PR that fixes the issue of streaming output occurring in exception branches by updating stream routing logic and adding a new test.

• Modified test cases to verify that streaming output no longer occurs in exception branches.
• Updated stream processor logic to remove the current node id from answer dependencies when evaluating success branch edges.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
api/tests/unit_tests/core/workflow/nodes/test_continue_on_error.py	Adds tests to ensure streaming is prevented in exception branches, including verifying event types.
api/core/workflow/nodes/answer/answer_stream_processor.py	Updates comment and edge selection logic to correctly remove node dependencies for successful branch streaming.

[laipz8200]

Please remember to open an issue before creating a pull request.

[Nov1c444]

Please remember to open an issue before creating a pull request.

Got it.