Update API specification

[AndreyVMarkelov]

Summary

• advance the Dropbox API specification submodule from 3d1080a to d461e03
• regenerate src/endpoints.ts with Stone v3.5.2
• include API additions and updates published between November 2022 and July 2026

Impact

The Explorer now reflects the latest specification currently published on the upstream main branch. This adds newly published endpoints and parameters and removes definitions no longer present upstream.

The update was performed manually because the repository's Spec Update workflow has no configured SPEC_UPDATE_TOKEN; this PR does not change that workflow.

Validation

• clean npm ci from the public npm registry
• npm run lint
• npm run typecheck
• npm test
• npm run coverage:unit
• npm run build
• ./codegen/run_codegen.sh repeatability check
• git diff --check
• npm audit: 0 vulnerabilities

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 10.68%. Comparing base (5d34f84) to head (0e41633).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #334      +/-   ##
==========================================
- Coverage   11.08%   10.68%   -0.40%     
==========================================
  Files           6        6              
  Lines        5568     5775     +207     
  Branches        4        4              
==========================================
  Hits          617      617              
- Misses       4951     5158     +207     

Flag	Coverage Δ
unit	10.68% <ø> (-0.40%)	⬇️

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