message: cast balance to int64
diff: @@ -25,7 +25,7 @@ class Staking(Rule):
  return f"""
  with filtered_balances as (
  - select tht.safe, tht.balance_uint64::bigint as balance_int64, tht._block_number, tht.token,
  + select tht.safe, tht.balance_uint64::int64 as balance_int64, tht._block_number, tht.token,
  from {token_holder_table} as tht, {safe_owner_table} as sot
  where tht.safe = sot.safe
  and sot.type = 'depot'
  