- Added /api/v2/greet POST endpoint with JSON request/response
- Implemented ServiceV2 with Hello my friend <name>! greeting format
- Added api.v2_enabled feature flag (default: false)
- Extended BDD tests to cover v2 scenarios
- Maintained full backward compatibility with v1 API
- Added DLC_API_V2_ENABLED environment variable support
- Created ADR 0010-api-v2-feature-flag.md
- Updated configuration system to support API versioning