MetisDB raw WAL implement

Labels: storage, blockchain-state, light-mode

Summary:
Introduce a new storage mode where only the ordered transaction list (TxList) is persisted. Other block components such as headers, receipts, and full state diffs are reconstructed on demand from TxList.

Subtasks:

• Design stateless boot mode based on TxList replay.
• Develop replay mechanism compatible with execution engine.
• Provide fallback options for full archival nodes.