chore: scaffold M0 — repo structure, ADRs, dev environment, pre-merge checklist

infrastructure/docker/docker-compose.prod.yml

@@ -0,0 +1,12 @@
+# Scaffolded for Coolify (see ADR-003) — not yet connected to any live Coolify app.
+# No ports exposed here on purpose: production access goes through the reverse proxy,
+# never by publishing container ports directly.
+services:
+  postgres:
+    restart: always
+
+  qdrant:
+    restart: always
+
+  redis:
+    restart: always