feat(generator): automate compute discovery document updates

[colinmoy]

No description provided.

[gemini-code-assist]

Code Review

This pull request updates the update_discovery_doc.sh script to download the discovery document to a temporary file and compare its revision with the current one before overwriting, avoiding unnecessary updates. The review feedback recommends adding explicit error checks for the mktemp and curl commands to ensure the script fails loudly and gracefully if these operations fail.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.25%. Comparing base (5a449d9) to head (9234e5b).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #16368      +/-   ##
==========================================
- Coverage   92.27%   92.25%   -0.02%     
==========================================
  Files        2239     2239              
  Lines      210719   210719              
==========================================
- Hits       194444   194403      -41     
- Misses      16275    16316      +41     

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