fix: add 'global' keyword for _active_connections, _total_requests

v4: ThreadingTCPServer + /status endpoint + active_connections tracking

chunk size 1MB for 2-3x throughput improvement

v3 stream-through; forward range to HF; cache on full request

v3: stream-through from HF dataset, cache simultaneously

v3: stream-through from HF dataset, cache simultaneously

fix: subdirectory cache support, URL-decode, parent dirs

Proxy v2

Proxy cache service

initial commit