TestKit integration, CI/CD speed boosts, connection-pooling improvements, and the removal of legacy HTTP support.

What’s new: TestKit integration, CI/CD speed boosts, connection-pooling improvements, and the removal of legacy HTTP support.

Re-enabled Features

• Full TestKit backend for running Neo4j integration tests in CI.

Improvements
CI/CD optimizations

• Enabled Docker image caching and Composer caching across workflows.
• Refactored GitHub Actions to speed up builds (docker build cache, service-restart logic, down-flags, etc.).
• Flexible logging tests to support Neo4j 4.x & 5.x.

Connection pooling

• Simplify acquiring and reusing Bolt connections for better performance and resource usage.

Bug Fixes

• Uncovered by testkit: Resolved failures in ResultSummary, authentication, bookmarks, authentication and timeout management.
• Neo4jConnectionPool: Fixed advertised address and routing logic.

⚠️ Breaking Changes

• HTTP support removed. Use Neo4j Query API instead.

📚 Miscellaneous

• Minor typo fixes
• object-model cleanup