Tracking: ExEx Write-Ahead-Log (WAL)

[shekhirin]

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1. feat(exex): write ahead log #10995
   A-exex C-enhancement +2
2. feat(exex): finalize ExEx WAL on new finalized block header #11174
   +0
3. Document why do we need a WAL for ExExes and what is it #11201
   A-exex C-docs +2
   
4. Backfill from WAL on a new ExExNotificationsWithHead subscription #11207
   A-exex C-enhancement +2
   
5. Properly handle restart edge cases between ExEx and new engine #10489
   A-blockchain-tree A-exex M-prevent-stale S-needs-design +4
   
6. ExExEvent::FinishedHeight should have a block hash #11256
   A-exex C-enhancement +2
   
7. ExEx WAL should write notifications to files atomically #11257
   A-exex C-enhancement +2
   
8. ExEx WAL block cache should have parent hashes #11258
   A-exex C-enhancement +2
   
9. Expose a read-only handle to the ExEx WAL #11261
   A-exex C-enhancement +2
   
10. Revert ExEx WAL in case it's ahead of the node #11202
    A-exex C-enhancement +2
    
11. Delete unneeded notifications from the ExEx WAL #11262
    A-exex C-enhancement +2
    
12. Write notifications to ExEx WAL using bincode or messagepack #11268
    A-exex C-enhancement +2
13. Compact binary serde for TrieUpdates #11370
    A-trie C-enhancement +2
    
14. Commit notifications to WAL before sending to ExExes #11322
    A-exex C-enhancement +2
    
15. Observability for ExEx WAL #11425
    A-exex A-observability C-enhancement +3
    
16. feat(exex): commit only notifications with unfinalized blocks to WAL #11638
    A-exex C-enhancement +2
17. Introduce a custom enum for ExEx WAL errors #11423
    A-exex C-debt D-good-first-issue +3
    
18. Investigate how ExEx WAL should work with reth stage unwind CLI #11426
    A-exex C-enhancement S-needs-investigation S-stale +4
19. Investigate how ExEx WAL should work with reth db drop CLI #11803
    A-exex C-enhancement S-needs-investigation +3
20. Subscribe to notifications with head in OP Bridge and Rollup examples reth-exex-examples#25
    enhancement +1

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