chore(cli): test to specify 'summary' as an option in gRPC

[devin-ai-integration]

Description

Refs: Session requested by kenny@buildwithfern.com (kenny@buildwithfern.com)
Session URL: https://app.devin.ai/sessions/35ba7fe604104e64afe342a676df4463

This PR adds support for custom fern.summary proto option to explicitly set gRPC endpoint display names in proto files. It also improves the automatic name generation for gRPC endpoints by extracting method names from request type names (e.g., "CreateCommentRequest" → "Create Comment").

Changes Made

• Added grpc-comments test fixture demonstrating gRPC proto with custom endpoint naming
• Modified convertPackage.ts to extract method names from request type names for better display names (e.g., "CreateCommentRequest" → "Create Comment")
• Added support for custom fern.summary proto option in test fixture (proto file includes option (fern.summary) = "Add a Comment";)
• Temporarily pinned protoc-gen-openapi to commit 1aa7fe8 in CI workflows and bootstrap.sh to support the custom option (depends on feat: add support for custom fern.summary proto option protoc-gen-openapi#13)
• Added CLI version 0.123.0 with changelog entry for the feature
• Updated README.md generator (not applicable)

Testing

• Unit tests added/updated - Added comprehensive test in openapi-from-flag.test.ts for gRPC proto processing
• Manual testing completed - Verified FDR output shows custom summary "Add a Comment" instead of auto-generated "Create Comment"
• Test snapshots validate the complete proto → OpenAPI → IR → FDR pipeline

Important Notes for Reviewers

⚠️ Cross-repo dependency: This PR temporarily pins protoc-gen-openapi to a specific commit from PR #13. Once that PR is merged and released, the pin should be updated to @latest or a tagged release.

Key areas to review:

1. Name extraction logic in convertPackage.ts (lines 170-183): The code extracts method names from request types ending in "Request". Verify this doesn't break existing endpoints or miss edge cases.

2. Conditional logic: The endpoint name is determined by:

   • First: explicit displayName from IR
   • Second: custom fern.summary option (via OpenAPI summary field)
   • Third: extracted method name from request type (if OpenAPI source + named request type ending in "Request")
   • Fallback: startCase of original name

3. Test fixture structure: The fern/options.proto file is copied into the test fixture for local testing. This is intentional for the test but should eventually be a proper Buf module dependency.

4. Pinned dependency: Verify the commit hash 1aa7fe870834ed27024dc44afd95648a0d63ec57 is correct and matches protoc-gen-openapi PR improvement: misc fixes to generate ir #13.

[devin-ai-integration]

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