Security: P2P Gossip Authentication & Privacy

[MichaelSovereign]

Summary

This PR addresses a significant security and privacy concern in the P2P synchronization layer where sensitive CRDT state data was exposed through unauthenticated GET endpoints.

Changes

1. Authenticated Sync Endpoints: Wrapped and with HMAC signature verification. This ensures that only authorized nodes within the same P2P cluster (sharing the ) can pull the network state.
2. Path-Based Verification: Enhanced the helper to verify signatures over request paths and timestamps, preventing unauthorized data discovery by external actors.
3. Information Protection: Prevents mass scraping of miner fingerprints and balances by unauthorized entities.

Closes #7440