2022-05-18 thorchain.rewards_events missing rows

This table was a convenient one to check directly, but rather than only filling in this table's missing rows, please update all tables in a way that fills in this table's missing rows as a consequence (using it as a canary).

Note that block 12467 is indeed the correct 'firstblock', as seen by a search for "bond_reward" in ( http://midgard.thorchain.info/v2/debug/block/12467 ) versus ( http://midgard.thorchain.info/v2/debug/block/12466 ).

For a commaless display, ( https://app.flipsidecrypto.com/velocity/queries/24a53a0a-e23c-4434-a476-e7e755a9c08c ).