refactor(cli): remove git analytics commands

Remove dev owners and dev activity commands to refocus on semantic value.
Dev-agent's unique value is semantic search (embeddings + AST), not git
analytics which GitHub/git already provide.

Changes:
- Remove dev owners command (891 lines)
- Remove dev activity command (175 lines)
- Clean up dead code in change-frequency.ts (calculateFileAuthorContributions)
- Keep code_metadata for introspection/debugging
- Keep calculateChangeFrequency for dev_map MCP tool

BREAKING CHANGE: dev owners and dev activity commands removed
- Use git log or GitHub for contributor/activity analytics
- Reduces codebase by ~1,200 lines
- Eliminates git caching complexity
- Focuses on MCP tools for AI context

Author: prosdev

packages/cli/src/cli.ts

@@ -2,7 +2,6 @@
 
 import chalk from 'chalk';
 import { Command } from 'commander';
-import { activityCommand } from './commands/activity.js';
 import { cleanCommand } from './commands/clean.js';
 import { compactCommand } from './commands/compact.js';
 import { dashboardCommand } from './commands/dashboard.js';
@@ -13,7 +12,6 @@ import { indexCommand } from './commands/index.js';
 import { initCommand } from './commands/init.js';
 import { mapCommand } from './commands/map.js';
 import { mcpCommand } from './commands/mcp.js';
-import { ownersCommand } from './commands/owners.js';
 import { planCommand } from './commands/plan.js';
 import { searchCommand } from './commands/search.js';
 import { statsCommand } from './commands/stats.js';
@@ -42,8 +40,6 @@ program.addCommand(gitCommand);
 program.addCommand(mapCommand);
 program.addCommand(updateCommand);
 program.addCommand(statsCommand);
-program.addCommand(ownersCommand);
-program.addCommand(activityCommand);
 program.addCommand(dashboardCommand);
 program.addCommand(compactCommand);
 program.addCommand(cleanCommand);

packages/cli/src/commands/activity.ts

@@ -205,8 +205,8 @@ export const indexCommand = new Command('index')
               'documents',
               embeddingStartTime
             );
-          } else {
-            // Scanning phase
+          } else if (progress.phase === 'scanning') {
+            // Scanning phase - show file progress
             progressRenderer.updateSectionWithRate(
               progress.filesProcessed,
               progress.totalFiles,