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- Remove all upterm/tmate SSH debugging infrastructure - Restore clean CI workflow from main branch - Remove diagnostic script that was only for SSH debugging - Keep valuable DiskANN and HNSW backend improvements This provides a clean base to add targeted pytest hang debugging without the complexity of SSH sessions. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>