## Motivation

Errors during `readMessage` (oversized snappy responses, corrupt data,
etc.) were caught and silently converted to `{ status: UNKNOWN }` return
values instead of re-throwing. Since `sendRequestToPeer` only calls
`handleResponseError` in its own catch block, none of these errors
resulted in peer penalties. The request was simply retried with another
peer, allowing a malicious peer to waste bandwidth indefinitely.

## Approach

Re-throw non-protocol errors from `readMessage` so they propagate to
`sendRequestToPeer`'s catch block where `handleResponseError` applies
peer penalties. Additionally, introduce a dedicated
`OversizedSnappyResponseError` class so oversized responses get a
harsher `LowToleranceError` penalty (score -50, banned after 2 offenses)
instead of falling through to the generic `HighToleranceError`
catch-all.

## Changes

- **p2p (reqresp)**: Changed `readMessage` catch block to only return
status for `ReqRespStatusError` and re-throw all other errors, so they
reach `handleResponseError` for penalization
- **p2p (encoding)**: Added `OversizedSnappyResponseError` class for
explicit categorization
- **p2p (reqresp)**: Added `OversizedSnappyResponseError` handling in
`categorizeResponseError` with `LowToleranceError` severity

BEGIN_COMMIT_OVERRIDE
fix(p2p): fall back to maxTxsPerCheckpoint for per-block tx validation
(#21605)
chore: fixing M3 devcontainer builds (#21611)
fix: clamp finalized block to oldest available in world-state (#21643)
chore: fix proving logs script (#21335)
fix: (A-649) tx collector bench test (#21619)
fix(validator): process block proposals from own validator keys in HA
setups (#21603)
fix: add bounds when allocating arrays in deserialization (#21622)
fix: skip handleChainFinalized when block is behind oldest available
(#21656)
chore: demote finalized block skip log to trace (#21661)
fix: skip -march auto-detection for cross-compilation presets (#21356)
chore: revert "add bounds when allocating arrays in deserialization"
(#21622) (#21666)
fix: capture txs not available error reason in proposal handler (#21670)
fix: estimate gas in bot and make BatchCall.simulate() return
SimulationResult (#21676)
fix: prevent HA peer proposals from blocking equivocation in duplicate
proposal test (#21673)
fix(p2p): penalize peers for errors during response reading (#21680)
feat(sequencer): add build-ahead config and metrics (#20779)
chore: fixing build on mac (#21685)
fix: HA deadlock for last block edge case (#21690)
fix: process all contract classes in storeBroadcastedIndividualFunctions
(A-683) (#21686)
chore: add slack success post on nightly scenario (#21701)
fix(builder): persist contractsDB across blocks within a checkpoint
(#21520)
fix: only delete logs from rolled-back blocks, not entire tag (A-686)
(#21687)
chore(p2p): lower attestation pool per-slot caps to 2 (#21709)
chore(p2p): remove unused method (#21678)
fix(p2p): penalize peer on tx rejected by pool (#21677)
fix(test): workaround slow mock creation (#21708)
fix(sequencer): fix checkpoint budget redistribution for multi-block
slots (#21692)
fix: batch checkpoint unwinding in handleEpochPrune (A-690) (#21668)
fix(sequencer): add missing opts arg to checkpoint_builder tests
(#21733)
fix: race condition in fast tx collection (#21496)
fix: increase default postgres disk size from 1Gi to 10Gi (#21741)
fix: update batch_tx_requester tests to use RequestTracker (#21734)
chore: replace dead BOOTSTRAP_TO env var with bootstrap.sh build arg
(#21744)
fix(sequencer): extract gas and blob configs from valid requests only
(A-677) (#21747)
fix: deflake attempt for l1_tx_utils (#21743)
fix(test): fix flaky keystore reload test (#21749)
fix(test): fix flaky duplicate_attestation_slash test (#21753)
feat(pipeline): introduce pipeline views for building (#21026)
END_COMMIT_OVERRIDE

BEGIN_COMMIT_OVERRIDE
feat: entrypoint replay protection (#21649)
feat: guard BoundedVec oracle returns against dirty trailing storage
(#21589)
fix: add bounds when allocating arrays in deserialization (#21622)
feat: implement manual Packable for structs with sub-Field members
(#21576)
fix(aztec-node): throw on existing nullifier in
getLowNullifierMembershipWitness (#21472)
fix: use trait dispatch for array Packable::unpack in card_game_contract
(#21683)
fix(p2p): penalize peers for errors during response reading (#21680)
fix: update nullifier non-inclusion test expectations after early oracle
throw (backport #21600) (#21615)
fix(aztec-nr): fix OOB index with nonzero offset (#21613)
fix(builder): persist contractsDB across blocks within a checkpoint
(#21520)
fix(stdlib): accept null return_type for void Noir functions (#21647)
feat: gas estimations on send (#21646)
fix(validator): process block proposals from own validator keys in HA
setups (backport #21603) (#21659)
fix(p2p): penalize peer on tx rejected by pool (#21677)
fix(sequencer): fix checkpoint budget redistribution for multi-block
slots (#21692)
feat: sync cache invalidation oracle (backport #21459) (#21730)
feat!: make AES128 decrypt oracle return Option (backport #21696)
(#21735)
feat!: include init_hash in private initialization nullifier (backport
#21427) (#21736)
fix(sequencer): extract gas and blob configs from valid requests only
(A-677) (#21747)
chore: backport #21744 — replace dead BOOTSTRAP_TO env var with
bootstrap.sh build arg (#21748)
refactor: revert remove assert_bounded_vec_trimmed (#21758)
END_COMMIT_OVERRIDE