Add human-led conversation learning loop

tests/database.test.ts

@@ -108,9 +108,14 @@ describe('Database Client', () => {
         .all() as { name: string }[];
       // Existing domain/config tables plus account, conversation, sync, media
       // ownership and account-growth stores.
-      expect(tables.length).toBe(28);
+      expect(tables.length).toBe(33);
       expect(tables.map((table) => table.name)).toEqual(expect.arrayContaining([
         'candidate_queue',
+        'conversation_events',
+        'conversation_learning_trajectories',
+        'conversation_learning_decisions',
+        'learning_generation_context',
+        'learning_evaluation_runs',
         'runtime_state',
         'media_library_assets',
         'media_library_sends',