feat(generator): handle Any fields with Value or Struct

[colinmoy]

No description provided.

[gemini-code-assist]

Code Review

This pull request updates the discovery-to-proto generator to map the JSON schema 'any' type to google.protobuf.Value (and google.protobuf.Struct for additional properties) instead of google.protobuf.Any. This includes updating the type resolution logic, adding the necessary protobuf imports, and updating the corresponding unit tests. There are no review comments, and I have no feedback to provide.

[scotthart]

This import is unnecessary and is the cause for the changes in the generated C++ compute code. Let's update the generator to only add this import when needed.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.29%. Comparing base (e014d65) to head (2509790).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #16377   +/-   ##
=======================================
  Coverage   92.29%   92.29%           
=======================================
  Files        2244     2244           
  Lines      211631   211700   +69     
=======================================
+ Hits       195332   195398   +66     
- Misses      16299    16302    +3     

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