fix: pass forward debugger properties on exception

[robertvoinescu-work]

On exception we will get misleading error messages from protoc compiler if these are not passed forward. Note the specified properties are [DebuggerNonUserCode]:

Before (has misleading message to add support for optional fields):

2026-07-30T16:24:49.863Z Generating Google.Cloud.Sql.V1
google/cloud/sql/v1/cloud_sql_users.proto: is a proto3 file that contains optional fields, but code 
generator protoc-gen-gapic hasn't been updated to support optional fields in proto3. 
Please ask the owner of this code generator to support proto3 optional.
   --gapic_out: System.InvalidOperationException: Not all patterns can be matched to a parent
 resource for field CreateBackupRequest.parent
 

After:

2026-07-30T16:26:20.374Z Generating Google.Cloud.Sql.V1
    --gapic_out: System.InvalidOperationException: Not all patterns can be matched to a parent
  resource for field CreateBackupRequest.parent

b/540852437

[gemini-code-assist]

Code Review

This pull request refactors the initialization of CodeGeneratorResponse in Google.Api.Generator/Program.cs by extracting the supported features, minimum edition, and maximum edition values into private constants. These constants are now consistently applied to both the successful and failure response generation paths. There are no review comments, and the changes are clean and correct, so I have no feedback to provide.

[amanda-tarafa]

Merge this one as is, but @efevans can you take a look at the zizmor check failures and fix them on a separate PR?

[efevans]

Merge this one as is, but @efevans can you take a look at the zizmor check failures and fix them on a separate PR?

Will do