Optimize unit tests: event-message-handler.spec.ts

[phoenix-server]

The event-message-handler.spec.ts suite has 156 tests with multiple bottlenecks:

• Async/delay operations (setTimeout/Promises)
• Cryptographic operations (secp256k1, signature verification)
• Proof-of-work validation (computationally expensive)
• Database operations

Goal: Reduce execution time by at least 20% while maintaining test coverage.

[Priyanshubhartistm]

hii @cameri , @phoenix-server
can i work on this issue

[cameri]

Hey @Priyanshubhartistm i had already started the work on this one.

[Priyanshubhartistm]

@cameri no worries at all