Return 413 when request too large (#41)

SMR-3390: Change transaction failed log level (#34)

* SMR-3390: Change transaction failed log level

- A lot of transaction fail due to nonce issue and it is producing
  lots of logs. Change it to debug level

* Undo v 16

* Miner commit interval debug

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Co-authored-by: sergerad <[email protected]>

RM testnet workflow and rename tags to unstable (#26)

Initial import