v0.7.1: configurable rate limits + timeouts, proxq v0.5.1 - bump proxq v0.4.1 → v0.5.1 (adds Go OpenAI client package, job header tracking) - all nginx rate limits configurable via env vars: RATELIMIT_ADMIN, RATELIMIT_API, RATELIMIT_STORAGE, RATELIMIT_CLAUDEBOX, RATELIMIT_BROWSER, RATELIMIT_PROXQ plus corresponding _BURST vars for each zone - all nginx proxy timeouts configurable via env vars: TIMEOUT_ADMIN (60s), TIMEOUT_API (600s), TIMEOUT_CLAUDEBOX (600s), TIMEOUT_BROWSER (600s), TIMEOUT_PROXQ (30s) - NGINX_MAX_BODY_SIZE configurable (default 50m) - README: fix Mistral/Cohere free tier labels in flags table, update nginx service description with configurable limits, note Redis DB 1 usage by proxq - .env.example: add rate limit, timeout, and proxq config vars