Enhancements and Refactor for Maintainability, and Performance

[stav-bentov]

Feature Addition:

• Added IP address validation in the node address update logic to ensure robust input handling and prevent invalid configurations.
  Commit: a7178a383

Refactoring:

• Cluster Size Computation: Extracted cluster size computation into a helper function for improved readability and reusability.
  Commit: a3dd42bf4
• File Event Processing: Encapsulated loop logic into a dedicated function processSingleFileEvent() to isolate responsibilities and simplify the main code flow.
  Commit: 215dcd602
• Key Expiration Check: Optimized the key expiration check logic with branch prediction hints, enhancing performance during runtime.
  Commit: 733ef16c6

[zuiderkwast]

Duplicate of #1616