Encore 0.3.0

0.3.0 is the first release of Testworld after the hardfork (codename "Encore") on 2/4/2021.

The fork brings along a set of changes that are incompatible with the previous release, including but not limited to:

• Rejecting bad snark work from the pool instead of including bad transactions in blocks #7666
• A proper limit on maximum connections #7751
• A new grace period around minimum window density checks #7504

A variety of compatible bug fixes:

• Properly handle race conditions around ledger updates #7759
• Retry logic in archive node #7707
• Balance data in archive node #7735 #7766 #7680

And major improvements to the infrastructure and deployment:

• Static PeerIDs for O(1) Labs Nodes (this should mean a much more stable peers.txt file) #7789 #7608
• Helm chart changelogs are now on artifact hub (check them out for more details on how our charts have changed): https://artifacthub.io/packages/search?page=1&ts_query_web=mina
• Watchdog improvements #7752
• More Terraform modularity #7744

Known Issues:

• Refuses to exchange peers once max-connections is reached
• add-peers command and graphql are broken
• peer exchange dials invalid peers
  All of the above fixed in https://github.com/MinaProtocol/mina/releases/tag/0.3.3

See 0.2.12...0.3.0 for the full list of commits between releases.