Unsigned 64-bit integer parameters mishandled in prepared-statement binding

When a Python int in the unsigned 64-bit range [2^63, 2^64-1] is bound as a parameter to a prepared statement (binary protocol), the connector does not set the COM_STMT_EXECUTE / COM_STMT_BULK_EXECUTE unsigned parameter flag (0x80) and packs the value as a signed 64-bit integer.

that issue is either in pure python and C implementation.