Fix crypto wallet: correct MySQL INSERT IGNORE syntax, improve error logging

- Replace invalid 'ON CONFLICT DO NOTHING' (PostgreSQL) with 'INSERT IGNORE' (MySQL)
  for user_crypto_wallets upsert
- Use repr() and full traceback in exception logging so blank-message exceptions
  are still diagnosable
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

aisbf/payments/crypto/wallet.py

@@ -6,6 +6,7 @@ Each crypto type has its own encrypted master seed, from which user addresses
 are deterministically derived.
 """
 import logging
+import traceback
 from mnemonic import Mnemonic
 from bip32 import BIP32
 from cryptography.fernet import Fernet
@@ -195,16 +196,21 @@ class CryptoWalletManager:
                         pass
                     if attempt == 4:
                         raise
-                    logger.warning(f"crypto address derivation conflict (attempt {attempt+1}): {exc}")
+                    logger.warning(f"crypto address derivation conflict (attempt {attempt+1}): {exc!r}\n{traceback.format_exc()}")
 
         with self.db._get_connection() as conn:
             cursor = conn.cursor()
-            insert_or_ignore = "INSERT OR IGNORE" if self.db.db_type == 'sqlite' else "INSERT"
-            on_conflict = "" if self.db.db_type == 'sqlite' else " ON CONFLICT DO NOTHING"
+            if self.db.db_type == 'sqlite':
+                cursor.execute(f"""
+                    INSERT OR IGNORE INTO user_crypto_wallets
+                    (user_id, crypto_type, balance_crypto, balance_fiat)
+                    VALUES ({placeholder}, {placeholder}, 0, 0)
+                """, (user_id, crypto_type))
+            else:
                 cursor.execute(f"""
-                {insert_or_ignore} INTO user_crypto_wallets
+                    INSERT IGNORE INTO user_crypto_wallets
                     (user_id, crypto_type, balance_crypto, balance_fiat)
-                VALUES ({placeholder}, {placeholder}, 0, 0){on_conflict}
+                    VALUES ({placeholder}, {placeholder}, 0, 0)
                 """, (user_id, crypto_type))
             conn.commit()
 

main.py

@@ -8330,7 +8330,8 @@ async def dashboard_wallet_topup(request: Request):
         try:
             address = await ps.wallet_manager.get_or_create_user_address(user_id, crypto_type)
         except Exception as e:
-            logger.error(f"Crypto address generation error: {e}")
+            import traceback as _tb
+            logger.error(f"Crypto address generation error: {e!r}\n{_tb.format_exc()}")
             return JSONResponse({"error": "Could not generate deposit address"}, status_code=503)
         return JSONResponse({
             "type": "crypto",