Security: Anti-Double-Mining Hash Integrity

[MichaelSovereign]

Summary

This PR improves the machine identity hashing mechanism in the module to prevent potential identity collisions.

Changes

1. Full Hash Utilization: Replaced the 16-character truncated SHA-256 hash with the full 64-character hex string. This significantly reduces the probability of identity collisions where two distinct physical machines might be incorrectly identified as the same machine, leading to denial of rewards.
2. Identity Robustness: Ensures that the machine identity is globally unique and cryptographically sound.

Closes #7458