add druq_ErroredMessage table & migration
upsert ErroredMessage when a msg fails last attempt
add errored-retry command to requeue an errored message
add explanation for why we use a new CreatedOn for msg
extract  SinglePartitionOptions and add alter data prompt
finishing tweaks
code review feedback & better help
Merge pull request #82 from daptiv/easier-errored-msg-recovery

Easier errored msg recovery