Show Reddit post age in conversations

src/database/client.ts

@@ -36,6 +36,7 @@ export function runMigrations(db: Database.Database): void {
       image_url TEXT,
       image_analysis TEXT,
       generated_message TEXT,
+      post_created_at INTEGER,
       processed_at INTEGER NOT NULL,
       message_sent INTEGER DEFAULT 0,
       error TEXT
@@ -272,6 +273,9 @@ export function runMigrations(db: Database.Database): void {
       CREATE INDEX IF NOT EXISTS idx_ai_usage_model ON ai_usage(actual_model, requested_model, created_at DESC);
       CREATE INDEX IF NOT EXISTS idx_ai_usage_account ON ai_usage(account_id, created_at DESC);
     `),
+    () => {
+      addColumnIfNotExists(db, 'processed_posts', 'post_created_at', 'INTEGER');
+    },
   ];
 
   let currentVersion = db.pragma('user_version', { simple: true }) as number;