refactor: update internal command references in all plugin files

Updated:
- projman: 4 commands + 4 skills + integration snippet
- git-flow: 4 commands + 3 skills + integration snippet
- pr-review: 1 command cross-reference
- cmdb-assistant: 1 command + 1 skill
- data-platform: 8 commands + integration snippet
- viz-platform: 11 commands + integration snippet
- contract-validator: 1 command + 1 skill + 1 agent

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

plugins/projman/skills/review-checklist.md

@@ -12,7 +12,7 @@ Defines code review criteria, severity classification, and output format.
 ## When to Use
 
 - **Code Reviewer agent**: During pre-sprint-close review
-- **Commands**: `/review`
+- **Commands**: `/pm-review`
 
 ---