Publish reading timers in production PowerSync setup #62

Production bootstrap does not grant or publish reading_timers, although the stream and local setup include it. Add the table to both production statements and verify all stream tables have SELECT grants and publication membership.

Release prerequisite for PapyrusReader/client#124 and follow-up to #61. Related requirements: FR-5_1 (PapyrusReader/docs#34), FR-5_3 (PapyrusReader/docs#36), FR-6_3 (PapyrusReader/docs#39).