feat(deploy): add Docker Compose and Traefik edge stack

Provide shared, development, and production compose overlays with Traefik routing.

docker-compose.yml

@@ -0,0 +1,11 @@
+# Default local stack = base + Traefik (dev).
+# Prefer explicit scripts for clarity:
+#   ./scripts/compose-dev.sh up -d --build
+#   ./scripts/compose-prod.sh up -d --build
+#
+# Equivalent:
+#   docker compose -f deploy/compose/compose.yaml -f deploy/compose/compose.dev.yaml up -d --build
+
+include:
+  - path: deploy/compose/compose.yaml
+  - path: deploy/compose/compose.dev.yaml