docs: sync documentation with code changes for v5.1.0

Changes applied:
- Updated version references from 5.0.0 to 5.1.0 (CLAUDE.md, CANONICAL-PATHS.md, setup.sh)
- Added missing projman commands to README.md (/suggest-version, /proposal-status)
- Added missing cmdb-assistant commands to README.md (/cmdb-audit, /cmdb-register, /cmdb-sync)
- Added /proposal-status to projman section in COMMANDS-CHEATSHEET.md
- Added 3 cmdb-assistant commands to COMMANDS-CHEATSHEET.md
- Added /suggest-version documentation to plugins/projman/README.md
- Added 4 missing scripts to CANONICAL-PATHS.md (verify-hooks.sh, setup-venvs.sh, venv-repair.sh, release.sh)

Fixes 14 documentation drift issues identified by /doc-guardian:doc-audit.

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

README.md

@@ -19,7 +19,7 @@ AI-guided sprint planning with full Gitea integration. Transforms a proven 15-sp
 - Branch-aware security (development/staging/production)
 - Pre-sprint-close code quality review and test verification
 
-**Commands:** `/sprint-plan`, `/sprint-start`, `/sprint-status`, `/sprint-close`, `/labels-sync`, `/initial-setup`, `/project-init`, `/project-sync`, `/review`, `/test-check`, `/test-gen`, `/debug-report`, `/debug-review`
+**Commands:** `/sprint-plan`, `/sprint-start`, `/sprint-status`, `/sprint-close`, `/labels-sync`, `/initial-setup`, `/project-init`, `/project-sync`, `/review`, `/test-check`, `/test-gen`, `/debug-report`, `/debug-review`, `/suggest-version`, `/proposal-status`
 
 #### [git-flow](./plugins/git-flow/README.md) *NEW in v3.0.0*
 **Git Workflow Automation**
@@ -107,7 +107,7 @@ Security vulnerability detection and code refactoring tools.
 
 Full CRUD operations for network infrastructure management directly from Claude Code.
 
-**Commands:** `/initial-setup`, `/cmdb-search`, `/cmdb-device`, `/cmdb-ip`, `/cmdb-site`
+**Commands:** `/initial-setup`, `/cmdb-search`, `/cmdb-device`, `/cmdb-ip`, `/cmdb-site`, `/cmdb-audit`, `/cmdb-register`, `/cmdb-sync`
 
 ### Data Engineering