feat(cubesql): Expose format in /v1/cubesql schema response

[ovr]

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.55%. Comparing base (5f432d8) to head (9ba7ad1).
⚠️ Report is 4 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #10555       +/-   ##
===========================================
+ Coverage   57.74%   78.55%   +20.81%     
===========================================
  Files         223      473      +250     
  Lines       17523    92686    +75163     
  Branches     3605     3605               
===========================================
+ Hits        10118    72809    +62691     
- Misses       6861    19333    +12472     
  Partials      544      544               

Flag	Coverage Δ
cube-backend	57.74% <ø> (ø)
cubesql	83.40% <100.00%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.