ci: replace inline smoke test with a just smoke recipe

Keeps CI a thin wrapper around the just contract; the same boot test now
runs locally with 'just smoke'.

Author: simonvanlierde

.github/workflows/ci.yml

@@ -22,7 +22,5 @@ jobs:
       - uses: actions/checkout@v7
       - uses: extractions/setup-just@v4
       - run: cp .env.example .env
-      - run: just up
-      - name: Wait for Grafana to report healthy
-        run: timeout 120 sh -c 'until curl -sf http://localhost:3000/api/health; do sleep 3; done'
+      - run: just smoke
       - run: just down

justfile

@@ -52,3 +52,9 @@ check:
 # Format YAML in place (needs yamlfmt on the host; optional).
 fmt:
     yamlfmt .
+
+# Boot the core stack and wait until Grafana reports healthy. Used by CI.
+smoke:
+    docker compose up -d
+    n=0; until curl -sf http://localhost:3000/api/health >/dev/null; do n=$((n+3)); [ $n -ge 120 ] && { echo "Grafana not healthy after 120s" >&2; exit 1; }; sleep 3; done
+    @echo "Grafana healthy"