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Refutation games re-use snapshotable states

Goal: instead of re-running from the closest PVM state by L1 block, the refutation game should re-use snapshotable states that it encounteres during the refutation game

• Regression tests for refutations !7922 (merged)
• More efficient dissection computations !6948 (merged)

Concurrent components

Goal: enable components of the rollup node to run independently The first step for this is to move components to a worker based implementation.

• Move Commitments (publishing, cementing) to a new worker #4873 (closed)
• Move refutation games to a worker #4928 (closed) !7792 (merged)

Replace durable storage implementation

Goal: make WASM PVM fast when run in rollup node

Working on it: @ilya.peresadin

• Implement immutable version of Chunked_byte_vector !7505 (merged)
• "Snapshot" current durable storage implementation in tests #4730 (closed) !7588 (merged)
• Implement in-memory durable storage variant #4506 !7934 (closed)
• Scoru/Node: Add fully fledged high load tztest for the TX kernel #4951 !7873 (closed)
• RPCs return 404 #4920 (closed)

Allow rollup node on mainnet

Goal: the rollup node executable must not exit when trying to run it against the mainnet

• Remove mainnet check #4640 (closed)

Confidence in interactions with L1

Goal: gain certainty that all rollup node interactions with the L1 node are safe and robust

• Rollup node supports protocol migrations #2901 (closed)
• Safely deal (or shut down) with protocol migration #5260 (closed)
• Injection protocol migration message !7857 (merged)

Restructure source code

Goal: allow for better testability and pave the way for components that are shared with the ZK rollup node to be extracted

• Move modules to libraries #4560 (closed) !7500 (merged)

Managable debug output from PVMs

Goal: ensure the debug output from PVMs is properly managed as events and ends up in the right places for good discoverability

• Add option to write kernel_debug messages to file #5261 (closed) !8277 (merged)

Maintenance

Goal: address all urgent problems arising with the rollup node

• Run node without configuration file #4212 (closed) !8148 (merged)
• Don't override configuration file silently #4718 (closed) !8154 (merged)
• Don't start ongoing refutation games #4911 (closed)
• Correct logic for refutation game timeouts #4910 (closed)
• Cannot compute reorgs in some cases #4903 (closed)
• Mutability bug in Fast Execution #5067 (closed)

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Left-over / out-of-scope

The following items have fallen out of scope or were not worked on.

• Worker management #2818
• Snapshot mechanism #2887
• Handle parallel refutation games #4426
• Move node out of proto_* Proposal #4552 (closed)
• Handle repeatedly failing operations #4573 (closed)
• Operation retry logic #4071 (closed) !6653 (merged) !7938 (closed) (Design doc)
• Strength injector #3459 (closed)
• Don't rely on injector to publish all commitments #4625 (closed)