Extends ContractFilter interface with hash-based methods (ShouldSyncStorageByHash,
ShouldSyncCodeByHash) for efficient filtering during snap sync when only account
hashes are available.
Adds NewPartialStateSync() function that accepts filter callbacks to control which
accounts have their storage/code synced during healing. This prevents the healing
phase from re-syncing storage for accounts that were intentionally skipped during
initial sync.
Part of partial statefulness Phase 2.
Implements EIP-7928 BAL-based partial statefulness infrastructure:
- Add PartialStateConfig to eth/ethconfig with CLI flags
- Add ContractFilter interface in core/state/partial/
- Add BAL history database accessors in core/rawdb/
- Add PartialState and BALHistory managers
This enables nodes to track only configured contracts' storage
while maintaining full account trie integrity.
