fix: make relay fast and concurrency-safe

requirements.txt

@@ -1,19 +1,9 @@
-# Core dependencies - pinned versions for reproducible builds
-flask==3.0.3
-requests==2.32.3
-
-# Async/Production dependencies
+# Web service
 quart==0.19.4
 uvicorn[standard]==0.30.6
-gunicorn==22.0.0
 
-# Performance optimizations
-httpx==0.27.2       # HTTP/2 connection pooling for Telegram
-diskcache==5.6.3    # Semantic caching
-brotli==1.1.0       # Compression
-
-# Resilience patterns
-tenacity==8.5.0     # Retry logic with exponential backoff
+# Optional production server
+hypercorn==0.17.3
 
 # Type hints support
-typing_extensions==4.12.2
+typing_extensions==4.12.2