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-schema.md

@@ -1,4 +1,4 @@
-# /schema - Schema Exploration
+# /data-schema - Schema Exploration
 
 ## Skills to Load
 - skills/mcp-tools-reference.md
@@ -11,7 +11,7 @@ Display header: `DATA-PLATFORM - Schema Explorer`
 ## Usage
 
 ```
-/schema [table_name | data_ref]
+/data-schema [table_name | data_ref]
 ```
 
 ## Workflow
@@ -30,9 +30,9 @@ Display header: `DATA-PLATFORM - Schema Explorer`
 ## Examples
 
 ```
-/schema                    # List all tables and DataFrames
-/schema customers          # Show table schema
-/schema sales_data         # Show DataFrame schema
+/data-schema                    # List all tables and DataFrames
+/data-schema customers          # Show table schema
+/data-schema sales_data         # Show DataFrame schema
 ```
 
 ## Required MCP Tools