Responsiveness tweaks: parallel spine+fog, sooner reveal, tile preconnect

Cut latency-spike causes: pool Dijkstra scratch + sync endpoints

Snappier interaction: cheaper panning + feature-state reveal + fuller warm-up

Robustly locate bucket pickles + log data resolution

Read data from the HF Space bucket at /data

Deploy: PyPy Docker server for Hugging Face Spaces

Perf pass: 2x faster fresh isochrone, bit-identical output

Montreal multi-modal transit isochrone map