fix: fix validate exclude generated, fix dashboard title

feat: ARIA Unified Dashboard, Blog, and Project Identity Overhaul

feat: ARIA Incident Generator — procedural incidents from seeds

Add /metrics and /leaderboard endpoints for live episode tracking

Add Task 7: Multi-Region Failover (partial failover with compliance constraints)

Add Task 6: Database Performance Degradation (missing index investigation)

Add Task 5: Security Incident Response (DDoS detection and mitigation)

Fix: Make POST /reset req body optional for OpenEnv validator

Improvements: partial log obs, search_logs action, CoT inference, dashboard UI, README motivation

Fix validate endpoint import ActionType

Initial submission: DevOps Incident Response OpenEnv