fix secrets read stuck

app/core/_secrets.py

@@ -41,15 +41,20 @@ def _init_seed_via_db() -> bytes:
 
     # Wait for table to exist
     start = time.time()
+    # Wait for table existence, reconnecting to avoid stale transactions
+    while True:
         with engine.connect() as conn:
-        while not db_ready(conn):
+            if db_ready(conn):
+                break
         time.sleep(0.5)
         if time.time() - start > 120:
             raise TimeoutError("service_config table not available")
 
     def read_seed() -> Optional[bytes]:
+        # Use a fresh connection/session per read to avoid snapshot staleness
         try:
-                with Session(bind=conn) as s:
+            with engine.connect() as rconn:
+                with Session(bind=rconn) as s:
                     row = s.query(ServiceConfigValue).filter(ServiceConfigValue.key == 'private_key').first()
                     if not row:
                         return None
@@ -69,16 +74,13 @@ def _init_seed_via_db() -> bytes:
             seed = _load_seed_from_env_or_generate()
             # Try insert; if another primary raced, ignore
             try:
-                with Session(bind=conn) as s:
+                with engine.connect() as wconn:
+                    with Session(bind=wconn) as s:
                         s.add(ServiceConfigValue(key='private_key', packed_value={"value": seed.hex()}))
                         s.commit()
                 make_log("HotWallet", "Seed saved in service_config by primary", level='info')
                 return seed
             except Exception:
-                try:
-                    conn.rollback()
-                except Exception:
-                    pass
                 # Read again in case of race
                 seed2 = read_seed()
                 if seed2: