feat(plugins): add Visual Output headers to all other plugin commands

Add single-line visual headers to 66 command files across 10 plugins:
- clarity-assist (2 commands): 💬
- claude-config-maintainer (5 commands): ⚙️
- cmdb-assistant (11 commands): 🖥️
- code-sentinel (3 commands): 🔒
- contract-validator (5 commands): ✅
- data-platform (10 commands): 📊
- doc-guardian (5 commands): 📝
- git-flow (8 commands): 🔀
- pr-review (7 commands): 🔍
- viz-platform (10 commands): 🎨

Each command now displays a consistent header at execution start:
┌────────────────────────────────────────────────────────────────┐
│  [icon] PLUGIN-NAME · Command Description                       │
└────────────────────────────────────────────────────────────────┘

Addresses #275 (other plugin commands visual output)

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

plugins/data-platform/commands/data-quality.md

@@ -1,5 +1,17 @@
 # /data-quality - Data Quality Assessment
 
+## Visual Output
+
+When executing this command, display the plugin header:
+
+```
+┌──────────────────────────────────────────────────────────────────┐
+│  📊 DATA-PLATFORM · Data Quality                                  │
+└──────────────────────────────────────────────────────────────────┘
+```
+
+Then proceed with the assessment.
+
 Comprehensive data quality check for DataFrames with pass/warn/fail scoring.
 
 ## Usage

plugins/data-platform/commands/dbt-test.md

@@ -1,5 +1,17 @@
 # /dbt-test - Run dbt Tests
 
+## Visual Output
+
+When executing this command, display the plugin header:
+
+```
+┌──────────────────────────────────────────────────────────────────┐
+│  📊 DATA-PLATFORM · dbt Tests                                     │
+└──────────────────────────────────────────────────────────────────┘
+```
+
+Then proceed with the tests.
+
 Execute dbt tests with formatted pass/fail results.
 
 ## Usage

plugins/data-platform/commands/explain.md

@@ -1,5 +1,17 @@
 # /explain - dbt Model Explanation
 
+## Visual Output
+
+When executing this command, display the plugin header:
+
+```
+┌──────────────────────────────────────────────────────────────────┐
+│  📊 DATA-PLATFORM · Model Explanation                             │
+└──────────────────────────────────────────────────────────────────┘
+```
+
+Then proceed with the explanation.
+
 Explain a dbt model's purpose, dependencies, and SQL logic.
 
 ## Usage

plugins/data-platform/commands/ingest.md

@@ -1,5 +1,17 @@
 # /ingest - Data Ingestion
 
+## Visual Output
+
+When executing this command, display the plugin header:
+
+```
+┌──────────────────────────────────────────────────────────────────┐
+│  📊 DATA-PLATFORM · Ingest                                        │
+└──────────────────────────────────────────────────────────────────┘
+```
+
+Then proceed with the ingestion.
+
 Load data from files or database into the data platform.
 
 ## Usage

plugins/data-platform/commands/initial-setup.md

@@ -4,6 +4,18 @@ description: Interactive setup wizard for data-platform plugin - configures MCP
 
 # Data Platform Setup Wizard
 
+## Visual Output
+
+When executing this command, display the plugin header:
+
+```
+┌──────────────────────────────────────────────────────────────────┐
+│  📊 DATA-PLATFORM · Setup Wizard                                  │
+└──────────────────────────────────────────────────────────────────┘
+```
+
+Then proceed with the setup.
+
 This command sets up the data-platform plugin with pandas, PostgreSQL, and dbt integration.
 
 ## Important Context

plugins/data-platform/commands/lineage-viz.md

@@ -1,5 +1,17 @@
 # /lineage-viz - Mermaid Lineage Visualization
 
+## Visual Output
+
+When executing this command, display the plugin header:
+
+```
+┌──────────────────────────────────────────────────────────────────┐
+│  📊 DATA-PLATFORM · Lineage Visualization                         │
+└──────────────────────────────────────────────────────────────────┘
+```
+
+Then proceed with the visualization.
+
 Generate Mermaid flowchart syntax for dbt model lineage.
 
 ## Usage

plugins/data-platform/commands/lineage.md

@@ -1,5 +1,17 @@
 # /lineage - Data Lineage Visualization
 
+## Visual Output
+
+When executing this command, display the plugin header:
+
+```
+┌──────────────────────────────────────────────────────────────────┐
+│  📊 DATA-PLATFORM · Lineage                                       │
+└──────────────────────────────────────────────────────────────────┘
+```
+
+Then proceed with the visualization.
+
 Show data lineage for dbt models or database tables.
 
 ## Usage

plugins/data-platform/commands/profile.md

@@ -1,5 +1,17 @@
 # /profile - Data Profiling
 
+## Visual Output
+
+When executing this command, display the plugin header:
+
+```
+┌──────────────────────────────────────────────────────────────────┐
+│  📊 DATA-PLATFORM · Data Profile                                  │
+└──────────────────────────────────────────────────────────────────┘
+```
+
+Then proceed with the profiling.
+
 Generate statistical profile and quality report for a DataFrame.
 
 ## Usage

plugins/data-platform/commands/run.md

@@ -1,5 +1,17 @@
 # /run - Execute dbt Models
 
+## Visual Output
+
+When executing this command, display the plugin header:
+
+```
+┌──────────────────────────────────────────────────────────────────┐
+│  📊 DATA-PLATFORM · dbt Run                                       │
+└──────────────────────────────────────────────────────────────────┘
+```
+
+Then proceed with the execution.
+
 Run dbt models with automatic pre-validation.
 
 ## Usage

plugins/data-platform/commands/schema.md

@@ -1,5 +1,17 @@
 # /schema - Schema Exploration
 
+## Visual Output
+
+When executing this command, display the plugin header:
+
+```
+┌──────────────────────────────────────────────────────────────────┐
+│  📊 DATA-PLATFORM · Schema Explorer                               │
+└──────────────────────────────────────────────────────────────────┘
+```
+
+Then proceed with the exploration.
+
 Display schema information for database tables or DataFrames.
 
 ## Usage