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/data-platform/commands/data-review.md

@@ -145,5 +145,5 @@ Use `/data-gate` when you want to automate.
 ## Related Commands
 
 - `/data-gate` - Binary pass/fail for automation
-- `/lineage` - Visualize dbt model dependencies
-- `/schema` - Explore database schema
+- `/data-lineage` - Visualize dbt model dependencies
+- `/data-schema` - Explore database schema