fix: address critical issues from codebase analysis

- Add hooks declarations to 9 plugins missing them in marketplace.json
- Change .mcp.json to use relative paths (portable across users)
- Fix pr-review hook schema to use standard nested hooks structure
- Fix token exposure in cmdb-assistant startup-check.sh (use curl -K)
- Update version to 5.4.1 in marketplace.json, README.md
- Fix CANONICAL-PATHS.md version (was incorrectly showing 5.5.0)

All 12 plugins now have hooks properly registered.
All validations pass.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

@@ -1,4 +1,4 @@
-# Leo Claude Marketplace - v5.4.0
+# Leo Claude Marketplace - v5.4.1
 
 A collection of Claude Code plugins for project management, infrastructure automation, and development workflows.