chore: separate websocket service

[hjlarry]

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Summary

fix #35973

also change default collaboration mode to True

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 Type Coverage

Metric	Base	PR	Delta
Type coverage	0.00%	43.68%	+43.68%
Strict coverage	0.00%	43.20%	+43.20%
Typed symbols	0	21,962	+21,962
Untyped symbols	0	28,631	+28,631
Modules	0	2547	+2,547

[RiskeyL]

docs update: langgenius/dify-docs@256cfc7