Describe the feature

We need to implement functionality to prune old trie data from the storage backend by applying a given BlockStateDiff to the earliest stored state and updating the earliest block number accordingly.

Goals:

• Implement prune_earliest_state
• Ensure that all related branch and leaf data older than the new earliest block are deleted
• Maintain data consistency and atomic updates during pruning.

Acceptance Criteria:

• Outdated trie nodes are removed or updated according to BlockStateDiff.
• new_earliest_block_number is stored successfully.
• Operation is atomic and crash-safe.
• Verified efficient performance for large state diffs.
• Unit test

Additional context

No response