This commit provides a minimal, focused fix for CI hanging issues by addressing the root causes:
**Key Changes:**
1. **ZMQ Resource Management:**
- Remove `context.term()` calls that were causing hangs
- Add `socket.setsockopt(zmq.LINGER, 0)` to prevent blocking on close
- Keep socket operations simple with default timeouts (no artificial limits)
2. **Process Cleanup:**
- Add timeout (1s) to final `process.wait()` in embedding server manager
- Prevent infinite waiting that was causing CI hangs
3. **Resource Cleanup Methods:**
- Add simple `cleanup()` methods to searchers and API classes
- Focus on C++ object destruction for DiskANN backend
- Avoid complex cleanup logic that could introduce new issues
4. **Basic Test Safety:**
- Simple pytest-timeout configuration (300s)
- Basic test session cleanup using psutil
- Minimal conftest.py without complex logic
**Philosophy:**
This solution avoids the complex multi-layered fixes from the previous PR chain.
Instead, it targets the specific root causes:
- ZMQ context termination blocking
- Process wait() without timeout
- C++ resource leaks in backends
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
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