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/cmdb-assistant/commands/cmdb-setup.md

@@ -18,7 +18,7 @@ Configure the cmdb-assistant plugin with NetBox integration.
 ## Usage
 
 ```
-/initial-setup
+/cmdb-setup
 ```
 
 ## Instructions

plugins/cmdb-assistant/skills/visual-header.md

@@ -24,7 +24,7 @@ Standard visual header for cmdb-assistant commands.
 | `/cmdb-topology` | Topology |
 | `/change-audit` | Change Audit |
 | `/ip-conflicts` | IP Conflict Detection |
-| `/initial-setup` | Setup Wizard |
+| `/cmdb-setup` | Setup Wizard |
 | Agent mode | Infrastructure Management |
 
 ## Usage