- If we recognize a storage diff as coming from a watched contract but
don't recognize the key, queue it for retrying later (after we've seen
an event that might help us recognize the key)
- Remove unused errs and args
- Panic on unrecognized types (should not happen)
- Continuously parse storage diffs CSV data to read Pit contract state
- Convert ilks in database to raw bytes32 value for use in generating
storage keys dynamically
- Persist storage diffs with block number and hash for validation
