Rewrite NostrApiExamples

[tcheeric]

Summary

• expand example to execute all event types
• call metadata, note, DM, mentions, deletion, ephemeral, reaction and NIP28 events

Testing

• mvn -q verify (fails: Docker environment not available)

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https://chatgpt.com/codex/tasks/task_b_688abcf76dd48331b054ab3e55497eed

[Copilot]

Pull Request Overview

This PR rewrites the NostrApiExamples class to execute all event types in a sequential manner instead of using a multi-threaded executor approach. The changes simplify the code structure while enabling comprehensive testing of all nostr-java API functionality including metadata, notes, direct messages, mentions, deletions, ephemeral events, reactions, and NIP28 channel operations.

Key changes:

• Removed Spring Boot dependency and multi-threaded execution
• Converted from ApplicationRunner to standalone main class with sequential execution
• Uncommented and enabled all previously disabled event type examples

Comments suppressed due to low confidence (1)

nostr-java-examples/src/main/java/nostr/examples/NostrApiExamples.java:114

• The unused variable tags was removed but the deletion event creation logic may be incomplete. Verify that the deletion event properly references the original event without explicit tag creation.

        var event = sendTextNoteEvent();

[Copilot]

[nitpick] The Unicode escape sequence \uD83D\uDCA9 for the emoji is less readable than the original emoji character. Consider using the actual emoji character for better code readability.

Suggested change

	nip25.createReactionEvent(event.getEvent(), "\uD83D\uDCA9", new Relay("localhost:5555")).signAndSend();
	nip25.createReactionEvent(event.getEvent(), "💩", new Relay("localhost:5555")).signAndSend();

[Copilot]

The filters() method visibility was changed from public to private, which may break external usage if this method was intended to be part of the public API for examples.

Suggested change

	private static void filters() throws InterruptedException {
	public static void filters() throws InterruptedException {

[Copilot]

[nitpick] Replacing structured logging (log.info) with System.out.println reduces the ability to control log levels and formatting. Consider using a simple logger or at least System.err for error cases.