Producer: When subscribing only store finalised blocks
Example log: {"level":"info","message":"last block #2318285 has hash 0x890ffaa8fb7369b55e12d92a1851056369d8446357c6fc78ebab64e68edaff61","service":"producer","timestamp":"2023-03-11T16:17:01.790Z"} {"level":"info","message":"Executing (default): INSERT INTO "raw_data" ("block_number","data") VALUES ($1,$2) RETURNING "block_number","data";","service":"producer","timestamp":"2023-03-11T16:17:01.846Z"} {"level":"info","message":"last block #2318285 has hash 0x5a22c6f88b166f73ef2368184d155bfd61426b8cc886bee9314dcad9000cf379","service":"producer","timestamp":"2023-03-11T16:17:37.248Z"}