[TASK] Implementation of Performance Metrics Collection (Node Latency Tracking)

[2003mahi]

Hello Hive Team!

I’ve been exploring the framework and noticed that Performance Metrics Collection is a key unchecked item on the project roadmap. I would love to officially claim this task and contribute the implementation!

My Approach: I am working on hooking up the latency_ms field in NodeResult by implementing high-resolution timers (time.perf_counter) within the GraphExecutor. This will track:

Sequential Execution: Precise timing for standard node transitions.
Parallel Execution: Latency tracking for fan-out branches in _execute_parallel_branches.
Total Latency: Aggregating per-node metrics into the final ExecutionResult.
I have already begun the local development and am currently verifying the logic against the existing test suite. I aim to submit a clean PR that brings us one step closer to full observability for Hive agents.

Looking forward to your thoughts and happy to be part of the community!