Add generics to event factories

[tcheeric]

Summary

• make EventFactory and GenericEventFactory generic
• use typed GenericEventFactory in NIP01
• add unit tests for the new generic methods
• run mvn -q verify

Testing

• mvn -q verify

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https://chatgpt.com/codex/tasks/task_b_688a863639c48331803c6366cc2bd9d6

[Copilot]

Pull Request Overview

This PR adds generic type support to the event factory classes to improve type safety when working with different tag types. The changes eliminate the need for unsafe type casting and provide better compile-time type checking.

• Makes EventFactory and GenericEventFactory generic with type parameters for event and tag types
• Updates NIP01 class to use typed GenericEventFactory instances instead of unsafe casting
• Adds unit tests to verify the new generic functionality works correctly

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
EventFactory.java	Adds generic type parameters <E extends GenericEvent, T extends BaseTag> to the abstract base class
GenericEventFactory.java	Implements generic type parameter <T extends BaseTag> and updates constructor/method signatures
NIP01.java	Replaces unsafe type casting with properly typed GenericEventFactory instances
NIP01Test.java	Adds unit tests for the new generic methods with recipient lists and tag lists