🤖 feat: implement trunk-based CI/CD with local testing

- Designed trunk-based development workflow with branch protection
- Added workflow validation job to prevent main branch breaks
- Integrated act (GitHub Actions runner) for local Gitea workflow testing
- Created unified CI/CD script interface (scripts/cicd.sh)
- Added YAML lint configuration with practical limits (400 chars)
- Organized all CI/CD scripts under scripts/cicd/ directory
- Confirmed Gitea/GitHub Actions compatibility via local testing
- Updated ADR 0017 with implementation details and test results
- Enhanced documentation with local development workflow

See ADR-0017 for complete trunk-based development workflow documentation.
See ADR-0016 for CI/CD pipeline design.

adr/0014-grpc-adoption-strategy.md

@@ -2,7 +2,7 @@
 
 **Date:** 2026-04-05
 **Status:** Accepted
-**Authors:** DanceLessonsCoach Team
+**Authors:** Arcodange Team
 
 ## Context
 
@@ -229,7 +229,7 @@ DLC_GRPC_ENABLED=true DLC_GRPC_PORT=invalid ./bin/server
 - [gRPC vs REST Comparison](https://grpc.io/blog/grpc-vs-rest)
 - [Hybrid API Design](https://cloud.google.com/blog/products/api-management/designing-hybrid-apis)
 
-**Approved by:** DanceLessonsCoach Team
+**Approved by:** Arcodange Team
 **Effective Date:** 2026-04-05
 
 ## Configuration Reference