v0.1.3

Tooling + quality pass.

• All 6 tools now declare readOnlyHint annotations + JSON output schemas; responses carry structuredContent.
• Tool descriptions expanded with parameter semantics, error behavior, and performance notes.
• GitHub Actions CI (build + unit tests + end-to-end MCP harness).
• Dockerfile + .dockerignore added.

Install: npm install -g git-insight-mcp