feat: add new fields to file upload response DTOs

[guoshiqiufeng]

feat: add new fields to file upload response DTOs

Add 7 new fields to FileUploadResponse and UploadFileInfoResponse to match the complete Dify API specification:

• previewUrl: Preview URL for the file
• sourceUrl: Source URL of the file
• originalUrl: Original URL of the file
• userId: User ID who uploaded the file
• tenantId: Tenant ID associated with the file
• conversationId: Conversation ID (nullable, for chat context)
• fileKey: File storage key/path

Changes:

• feat(chat): add 7 new fields to FileUploadResponse
• feat(dataset): add 7 new fields to UploadFileInfoResponse
• fix(dataset): correct typo in @JsonAlias from "mine_type" to "mime_type"
• test(chat): update FileUploadResponseTest to cover new fields
• test(dataset): create UploadFileInfoResponseTest with comprehensive coverage
• docs: update Chinese and English documentation for both response DTOs

All fields are nullable (optional) to maintain backward compatibility. Jackson automatically handles JSON deserialization for the new fields.

Breaking Changes:

• Equals/hashCode behavior changes due to new fields in DTOs
• Fixed mime_type alias (was incorrectly "mine_type")

Summary

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List any dependencies that are required for this change.

Resolves #333

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Checklist

Important

Please review the checklist below before submitting your pull request.

• This change requires a documentation update
• 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.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.27%. Comparing base (9e2e496) to head (f68c4c3).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #334   +/-   ##
=========================================
  Coverage     92.27%   92.27%           
  Complexity     2459     2459           
=========================================
  Files           185      185           
  Lines          6917     6917           
  Branches        795      795           
=========================================
  Hits           6383     6383           
  Misses          353      353           
  Partials        181      181           

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