v1.1 Stability & Inspector Integration

Delivered: Fixed critical JSON-RPC parse error bug and enabled MCP Inspector CLI testing

Key accomplishments:
- Fixed JSON-RPC parse error (-32700) affecting all tool calls
- Added stdio transport protocol compliance (newline delimiters, stderr-only debug logging)
- Enabled MCP Inspector UI/CLI compatibility with mcp.json configuration
- Integrated BATS automated testing framework (45 CLI tests)
- Created GitHub Actions CI/CD pipeline
- Documented Inspector testing (README) and BATS testing guide (TESTING.md)

Stats:
- 13 plans across 4 phases (Phases 8-11)
- 15,800+ lines of C++ code
- 191 tests passing (184 unit/integration/compliance + 7 CLI tests)
- 1 day rapid stabilization effort

See .planning/MILESTONES.md for full details.