Introduce comprehensive integration tests for Neo4j bug fixes covering batching, event relationships, and processing logic. Add rate-limiting to Neo4j queries using semaphores and retry policies to prevent authentication rate limiting and connection exhaustion, ensuring system stability under load.
Replaces outdated Neo4j test setup with a robust TestMain, shared test database, and utility functions for test data and migrations.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.
1. Added Err() method to CollectedResult (pkg/neo4j/neo4j.go:68-72):
- The resultiter.Neo4jResultIterator interface requires Err() error
- CollectedResult was missing this method, causing the type assertion to fail
- Since CollectedResult pre-fetches all records, Err() always returns nil
2. Fixed nil pointer dereference in buildCypherQuery (pkg/neo4j/query-events.go:173):
- Changed if *f.Limit > 0 to if f.Limit != nil && *f.Limit > 0
- This prevents a panic when filters don't specify a limit
3. Simplified parseEventsFromResult signature (pkg/neo4j/query-events.go:185):
- Changed from func (n *N) parseEventsFromResult(result any) to accept *CollectedResult directly
- This eliminates the runtime type assertion since ExecuteRead already returns *CollectedResult
- Removed the now-unused resultiter import
Replaced inline interface literals with dedicated, documented interface definitions in `pkg/interfaces/`. Introduced `TimeoutError`, `PolicyChecker`, and `Neo4jResultIterator` interfaces to clarify design, improve maintainability, and resolve potential circular dependencies. Updated config and constant usage rules for consistency. Incremented version to v0.31.11.
