feat: verify particle signatures [NET-539]

[justprosh]

Description

Verify particle signatures and drop incorrectly signed ones.

Motivation

Particle signatures are crucial for security and authentication.

Proposed Changes

• drop incorrectly signed particles
• particle signature is a concatenation of:
  • id as bytes
  • timestamp u64 as little-endian bytes
  • ttl u32 as little-endian bytes
  • script as bytes

Checklist

• The code follows the project's coding conventions and style guidelines.
• All tests related to the changes have passed successfully.
• Documentation has been updated to reflect the changes (if applicable).
• All new and existing unit tests have passed.
• I have self-reviewed my code and ensured its quality.
• I have added/updated necessary comments to aid understanding.

Reviewer Checklist

• Code has been reviewed for quality and adherence to guidelines.
• Tests have been reviewed and are sufficient to validate the changes.
• Documentation has been reviewed and is up to date.
• Any questions or concerns have been addressed.

[linear]

NET-539 Drop particles with incorrect signatures

[folex]

Can you check on the ed25519 exploit, please? https://github.com/MystenLabs/ed25519-unsafe-libs/tree/main/ed25519-chalkias-exploit

Check if it applies to us on current setup, and follow their recommendation regarding using verify_strict. https://docs.rs/ed25519-dalek/latest/ed25519_dalek/struct.VerifyingKey.html#method.verify_strict

[CLAassistant]

All committers have signed the CLA.