feat(migrate): CLI dispatch + verify

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/migrate/verify.test.js

@@ -0,0 +1,15 @@
+import { describe, it, expect, beforeAll } from 'vitest';
+import { resetDb } from '../helpers/db.js';
+import { migrateUp } from '../../lib/db/migrate.js';
+import * as map from '../../lib/db/repos/migration_map.js';
+import { verify } from '../../migrate/verify.js';
+import { randomUUID } from 'crypto';
+
+beforeAll(async () => { await resetDb(); await migrateUp(); await map.record('plans', 'a.md', 'page', randomUUID()); });
+
+describe('verify', () => {
+  it('reports per-source/type counts', async () => {
+    const out = await verify();
+    expect(out.map.find(r => r.source === 'plans' && r.entity_type === 'page').n).toBe(1);
+  });
+});