#41054 chore!: Remove `/ufs` endpoint

Proposed changes (including videos or screenshots)

Issue(s)

https://rocketchat.atlassian.net/browse/CORE-2283

Steps to test or reproduce

Further comments

Summary by CodeRabbit

Summary by CodeRabbit

• New Features

  • Standardized public download URLs to consistently use /file-upload/<id>/<encoded name> across UI, API conversion, and Slack bridging.

• Breaking Changes

  • Removed the legacy /ufs file-download endpoint and associated URL/path persistence for UFS.
  • Removed deprecated GridFS store alias and adjusted upload completion URL/path handling.

• Refactor

  • Centralized download authorization into a single request-level access flow.

• Documentation / Configuration

  • Removed the storesPath option from UploadFS.

• Tests

  • Updated end-to-end and unit tests to match the new URL/access behavior.