Summary

Related issue: #____

What changed?

• Centralized event kind metadata by extending Kind and deprecating Constants.Kind in favor of the enum values.
• Added a Lombok builder for GenericEvent so callers can assemble events with explicit kind handling.
• Reworked NIP-52 calendar deserializers to convert through GenericEvent, eliminating manual tag extraction and TODOs.
• Added unit coverage for the new builder plus calendar event, date-based, time-based, and RSVP decoding flows.

BREAKING

None.

Review focus

• Ensure the enum-backed kind values still satisfy existing API callers relying on Constants.Kind.
• Validate the calendar deserializer refactor retains expected tag mapping for NIP-52 events.

Checklist

• Scope ≤ 300 lines (or split/stack)
• Title is verb + object (e.g., “Refactor auth middleware to async”)
• Description links the issue and answers “why now?”
• BREAKING flagged if needed
• Tests/docs updated (if relevant)

Testing

• mvn -q verify (fails: xyz.tcheeric:nostr-java-bom:1.1.1 missing from Maven Central)

Network Access

• Blocked: https://repo.maven.apache.org/maven2/xyz/tcheeric/nostr-java-bom/1.1.1/

https://chatgpt.com/codex/tasks/task_b_68e337e2acfc83319e62250f0db94bc8