Add Phase 2: integrations, admin, and remaining commands

New commands: agent, trivia (with 30s timer reveal), ask (Ollama LLM
with cooldown), minecraft (RCON whitelist), health (admin-only metrics).
Adds metrics tracking, per-user cooldowns, and admin permission checks.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.env.example

@@ -5,3 +5,11 @@ MATRIX_DEVICE_ID=
 BOT_PREFIX=!
 ADMIN_USERS=@jared:matrix.lotusguild.org
 LOG_LEVEL=INFO
+
+# Integrations
+OLLAMA_URL=http://10.10.10.157:11434
+OLLAMA_MODEL=lotusllm
+MINECRAFT_RCON_HOST=10.10.10.67
+MINECRAFT_RCON_PORT=25575
+MINECRAFT_RCON_PASSWORD=
+COOLDOWN_SECONDS=120