Prioritize conversation replies

src/database/client.ts

@@ -312,6 +312,30 @@ export function runMigrations(db: Database.Database): void {
         updated_at INTEGER NOT NULL
       );
     `),
+    () => {
+      db.exec(`
+        CREATE TABLE IF NOT EXISTS conversation_automation_claims (
+          account_id TEXT NOT NULL,
+          conversation_id TEXT NOT NULL,
+          incoming_key TEXT NOT NULL,
+          status TEXT NOT NULL CHECK(status IN ('pending', 'sent')),
+          claimed_at INTEGER NOT NULL,
+          sent_at INTEGER,
+          reply_text TEXT,
+          incoming_at INTEGER,
+          last_attempt_at INTEGER,
+          attempt_count INTEGER NOT NULL DEFAULT 0,
+          PRIMARY KEY (account_id, conversation_id, incoming_key),
+          FOREIGN KEY (account_id) REFERENCES reddit_accounts(account_id) ON DELETE CASCADE
+        );
+        CREATE INDEX IF NOT EXISTS idx_conversation_automation_claims_status
+          ON conversation_automation_claims(account_id, status, claimed_at);
+      `);
+      addColumnIfNotExists(db, 'conversation_automation_claims', 'reply_text', 'TEXT');
+      addColumnIfNotExists(db, 'conversation_automation_claims', 'incoming_at', 'INTEGER');
+      addColumnIfNotExists(db, 'conversation_automation_claims', 'last_attempt_at', 'INTEGER');
+      addColumnIfNotExists(db, 'conversation_automation_claims', 'attempt_count', 'INTEGER NOT NULL DEFAULT 0');
+    },
   ];
 
   let currentVersion = db.pragma('user_version', { simple: true }) as number;