feat: upgrade to v2.0.0 with multi-mirror fallback, new endpoints, and LRU cache

- Add multi-mirror fallback system with 5 mirror domains
- Add LRU cache with configurable TTL per endpoint
- Add response compression (gzip)
- Add Seasons endpoint (/api/seasons/:id)
- Add Watch Order endpoint (/api/watch-order/:id)
- Add Latest Updated endpoint (/api/latest-updated)
- Add Download endpoint (/api/download)
- Add cache stats endpoint (/api/cache/stats)
- Add mirror status/reset endpoints (/api/mirrors, /api/mirrors/reset)
- Add configurable rate limiting with X-RateLimit headers
- Add request timeouts and entity too large handling
- Update documentation with all new endpoints
- Update CHANGELOG.md with v2.0.0 entry
- Update package.json version to 2.0.0
- Add 6 AI agent prompts for development

.env.example

@@ -2,4 +2,26 @@
 ALLOWED_ORIGINS=https://site1.com,https://site2.com
 
 # Port (optional, defaults to 4444)
-PORT=4444
+PORT=4444
+
+# Cache configuration
+CACHE_MAX_SIZE=200
+CACHE_DEFAULT_TTL=300000
+
+# Rate limiting
+RATE_LIMIT=100
+RATE_WINDOW=60000
+
+# Request timeout in milliseconds
+REQUEST_TIMEOUT=30000
+
+# Mirror configuration
+# Comma-separated list of mirror domains (in priority order)
+# Default: anikototv.to,anikoto.cz,anikoto.me,anikoto.net,anikototv.se
+MIRROR_DOMAINS=https://anikototv.to,https://anikoto.cz,https://anikoto.me,https://anikoto.net,https://anikototv.se
+
+# Mirror cache TTL in milliseconds (default: 1 hour)
+MIRROR_CACHE_TTL=3600000
+
+# Environment (production/development)
+NODE_ENV=production