AO3 Mirror v4 — initial commit

Cookie-aware proxy pool with CF challenge solving
- Tiered proxy pool (fast 50 + main 676)
- Per-proxy cf_clearance cookie persistence
- CF challenge detection + user-browser solving
- Safari + Chrome TLS fingerprint rotation
- Async FastAPI backend with LRU cache
- Passive daemon with systemd supervision
- Stats dashboard + Prometheus metrics

.gitignore

@@ -0,0 +1,31 @@
+# Python
+__pycache__/
+*.py[cod]
+*.pyo
+*.so
+
+# Logs
+*.log
+
+# Environment
+.env
+.env.local
+.env.*.local
+
+# IDE
+.vscode/
+.idea/
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Runtime artifacts
+/dev/shm/
+working_proxies.txt
+
+# Caddy
+caddy-access.log
+
+# Systemd service files (deployed separately)
+*.service