Add auto-sweep to duplicate detection path for confirmed payments

CRITICAL FIX: Auto-sweep was being skipped when payments moved to CONFIRMED
status via the duplicate detection path due to early return.

- Add auto-sweep logic to duplicate detection path before return
- Check if payment is CONFIRMED, has sweep address, and hasn't been swept
- Ensures funds are swept to cold storage even when duplicates are detected
- Maintains same sweep logic as normal payment processing path

This fixes the issue where payment 37ae9bf3-9bcf-11f0-a140-02dfe05770ee moved
to confirmed status but funds were never swept because the duplicate detection
path returned early before reaching auto-sweep logic.

make_post_sell/lib/crypto_watcher.py

@@ -1610,6 +1610,25 @@ def process_payment(
                             f"Failed to send sales email for payment {crypto_payment.id}: {e}"
                         )
 
+        # Auto-sweep confirmed payments that haven't been swept yet
+        if (
+            client
+            and crypto_payment.status == CryptoPayment.STATUS_CONFIRMED
+            and crypto_payment.shop_sweep_to_address
+            and not crypto_payment.is_swept
+        ):
+            logger.info(f"Payment {crypto_payment.id} confirmed - attempting sweep")
+            try:
+                sweep_success = auto_sweep_payment(
+                    client, crypto_payment, env_request.dbsession
+                )
+                if sweep_success and crypto_payment.is_swept:
+                    logger.info(f"Payment {crypto_payment.id} swept successfully")
+            except Exception as e:
+                logger.error(
+                    f"Auto-sweep failed for confirmed payment {crypto_payment.id}: {e}"
+                )
+
         env_request.dbsession.add(crypto_payment)
         return