- R1: Add health RPC endpoint with crash recovery status, uptime, and version - R2: Wrap all 5 Nostr client.connect() calls in 10s timeout - R3: Make backup restore atomic with staging dir and rollback on failure - I1: Add rate limiting, body size, and proxy timeouts to unauthenticated nginx endpoints Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>