Replaces outdated Neo4j test setup with a robust TestMain, shared test database, and utility functions for test data and migrations. Improves Cypher generation for processing e-tags, p-tags, and other tags to ensure compliance with Neo4j syntax. Added integration test script and updated benchmark reports for Badger backend.
Introduced comprehensive benchmarks for `next-orly-badger`, `next-orly-neo4j`, and `nostr-rs-relay` backends, covering peak throughput, burst patterns, mixed read/write, query, and concurrent query/store tests. Reports include detailed performance metrics (e.g., events/sec, latency, success rates) and are saved as text and AsciiDoc formats. Aggregate summary also generated for testing consistency across relay implementations.
