Commits on Jun 27, 2024

1. [core] Make proper per epoch execution components (#18281) …

   ## Description 
   
   Make state accumulator a per epoch component. This also requires that we
   make checkpoint executor a proper per epoch component (previously it was
   only instantiated once, but `run_epoch` called once per epoch) since it
   needs to have a reference to the fresh accumulator after reconfig. Now
   we actually drop it after the call to `run_epoch` returns.
   
   ## Test plan 
   
   Passed against 120+ seeds:
   ```
   ./scripts/simtest/seed-search.py simtest --test test_simulated_load_reconfig_with_crashes_and_delays
   ```
   
   ---
   
   ## Release notes
   
   Check each box that your changes affect. If none of the boxes relate to
   your changes, release notes aren't required.
   
   For each box you select, include information after the relevant heading
   that describes the impact of your changes that a user might notice and
   any actions they must take to implement updates.
   
   - [ ] Protocol: 
   - [ ] Nodes (Validators and Full nodes): 
   - [ ] Indexer: 
   - [ ] JSON-RPC: 
   - [ ] GraphQL: 
   - [ ] CLI: 
   - [ ] Rust SDK:
   
   ---------
   
   Co-authored-by: Mark Logan <mark@mystenlabs.com>

   

   williampsmith and mystenmark committed Jun 27, 2024
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