feat: agregar columna last_command_at en users en migración v19

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

src/db/migrations/index.ts

@@ -490,5 +490,19 @@ export const migrations: Migration[] = [
         }
       } catch {}
     }
+  },
+  {
+    version: 19,
+    name: 'users-last-command-at',
+    checksum: 'v19-users-last-command-at-2025-10-25',
+    up: (db: Database) => {
+      try {
+        const cols = db.query(`PRAGMA table_info(users)`).all() as any[];
+        const hasCol = Array.isArray(cols) && cols.some((c: any) => String(c.name) === 'last_command_at');
+        if (!hasCol) {
+          db.exec(`ALTER TABLE users ADD COLUMN last_command_at TEXT NULL;`);
+        }
+      } catch {}
+    }
   }
 ];