1.0.0-beta5

Highlights:
- Fix all PHPCS violations across entire codebase (285 files, 0 errors/warnings)
- Refactor long methods, enforce strict coding standards
- Add 5 new submodule service unit tests
- Fix stale tool counts in docs (22→25 base, 12→20 structure, 8→9 search_api)
- Add missing mcp_tools_jsonapi to README
- Add drush mcp-tools:client-config command for AI editor setup
- Fix CI: add missing composer deps, bump action versions
- Trim ~1,400 lines of doc bloat from public-facing files