feat(commands): make dispatch files active command handlers

All 25 dispatch files now have name: in frontmatter with Workflow
section that displays sub-commands and prompts for selection.
Bare /noun invocation is now useful instead of a dead end.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

plugins/data-platform/commands/data.md

@@ -1,14 +1,16 @@
 ---
-description: Data engineering tools with pandas, PostgreSQL, and dbt
+name: data
+description: Data engineering tools — type /data <action> for commands
 ---
 
 # /data
 
 Data engineering tools with pandas, PostgreSQL/PostGIS, and dbt integration.
+When invoked without a sub-command, display available actions and ask which to run.
 
-## Sub-commands
+## Available Commands
 
-| Sub-command | Description |
+| Command | Description |
 |-------------|-------------|
 | `/data ingest` | Load data from CSV, Parquet, JSON into DataFrame |
 | `/data profile` | Generate data profiling report with statistics |
@@ -22,3 +24,9 @@ Data engineering tools with pandas, PostgreSQL/PostGIS, and dbt integration.
 | `/data review` | Comprehensive data integrity audits |
 | `/data gate` | Binary pass/fail data integrity gates |
 | `/data setup` | Setup wizard for data-platform MCP servers |
+
+## Workflow
+
+1. Display the table above
+2. Ask: "Which command would you like to run?"
+3. Route to the selected sub-command