feat: crear tabla response_queue, actualizar tests DB y README

Co-authored-by: aider (openrouter/openai/gpt-5) <aider@aider.chat>

README.md

@@ -60,7 +60,7 @@ graph TD
 
 ## Arquitectura de la cola persistente (MVP)
 - Estados: queued | processing | sent | failed.
-- Campos mínimos por mensaje: id (PK), recipient, type (text), payload_text, status, attempts (0), last_error (nullable), created_at, updated_at.
+- Campos mínimos por mensaje: id (PK), recipient, type (text), message, status, attempts (0), last_error (nullable), created_at, updated_at.
 - Índices recomendados: (status, created_at) para seleccionar pendientes rápidamente.
 - Sin orden estricto por chat; el envío puede intercalarse entre destinatarios.
 - Concurrencia: N workers globales operando en bucle, cada uno toma mensajes en estado queued y los marca processing.

src/db.ts

@@ -72,6 +72,26 @@ export function initializeDatabase(instance: Database) {
       FOREIGN KEY (assigned_by) REFERENCES users(id) ON DELETE CASCADE
     );
   `);
+
+  // Create response_queue table (persistent outbox for replies)
+  instance.exec(`
+    CREATE TABLE IF NOT EXISTS response_queue (
+      id INTEGER PRIMARY KEY AUTOINCREMENT,
+      recipient TEXT NOT NULL,
+      message TEXT NOT NULL,
+      status TEXT NOT NULL DEFAULT 'queued' CHECK (status IN ('queued','processing','sent','failed')),
+      attempts INTEGER NOT NULL DEFAULT 0,
+      last_error TEXT NULL,
+      created_at TEXT DEFAULT (strftime('%Y-%m-%d %H:%M:%f', 'now')),
+      updated_at TEXT DEFAULT (strftime('%Y-%m-%d %H:%M:%f', 'now'))
+    );
+  `);
+
+  // Index to fetch pending items efficiently
+  instance.exec(`
+    CREATE INDEX IF NOT EXISTS idx_response_queue_status_created_at
+    ON response_queue (status, created_at);
+  `);
 }
 
 /**

tests/unit/db.test.ts

@@ -38,7 +38,7 @@ describe('Database', () => {
         .map((t: any) => t.name);
       
       // Order matters if foreign keys are involved during creation, though SQLite is flexible
-      const expectedTables = ['users', 'groups', 'tasks', 'task_assignments']; 
+      const expectedTables = ['users', 'groups', 'tasks', 'task_assignments', 'response_queue']; 
       const userTables = tables.filter(t => !t.startsWith('sqlite_'));
       // Check if all expected tables exist, order might vary slightly depending on execution
       expect(userTables).toHaveLength(expectedTables.length);
@@ -82,6 +82,14 @@ describe('Database', () => {
       const group = testDb.query("SELECT active FROM groups WHERE id = 'test-group'").get();
       expect(group.active).toBe(1); // SQLite uses 1 for TRUE
     });
+
+    test('response_queue table should have required columns', () => {
+      const columns = testDb
+        .query("PRAGMA table_info(response_queue)")
+        .all()
+        .map((c: any) => c.name);
+      expect(columns).toEqual(['id', 'recipient', 'message', 'status', 'attempts', 'last_error', 'created_at', 'updated_at']);
+    });
   });
 
   describe('Foreign Keys', () => {