fix: UTC-naive timestamps in distribute/db audit trail (V65)

distribute.py created_at, db.py updated_at/claim_fee now use
datetime.now(timezone.utc).replace(tzinfo=None) to match V62 scan stamps
and eliminate WIB (UTC+7) drift in payment/claim records.

db.py

@@ -206,9 +206,9 @@ def record_payment(run_id, owner, amount, status, created_at,
 
 def update_payment_status(payment_id, status, txid=None, error=None, updated_at=None):
     """Perbarui status satu transfer (V21): pending → sent|failed."""
-    from datetime import datetime
+    from datetime import datetime, timezone
     if updated_at is None:
-        updated_at = datetime.now().isoformat(timespec='seconds')
+        updated_at = datetime.now(timezone.utc).replace(tzinfo=None).isoformat(timespec='seconds')
     conn = connect()
     try:
         cur = conn.cursor()
@@ -317,12 +317,12 @@ def record_claim(run_date, claim_txid, reward, fee_amount, fee_status,
 
 def update_claim_fee(claim_id, fee_status, fee_txid=None):
     """Perbarui status fee satu klaim (V33): pending → sent|failed|skipped."""
-    from datetime import datetime
+    from datetime import datetime, timezone
     conn = connect()
     try:
         cur = conn.cursor()
         if fee_status == 'sent':
-            now = datetime.now().isoformat(timespec='seconds')
+            now = datetime.now(timezone.utc).replace(tzinfo=None).isoformat(timespec='seconds')
             cur.execute(_translate(
                 'UPDATE claim_runs SET fee_status = %s, fee_txid = %s, '
                 'fee_sent_at = %s WHERE claim_id = %s'),