ci: add ruff lint workflow and Makefile target

Author: ServerSideHannes

.github/workflows/lint.yml

@@ -0,0 +1,22 @@
+name: Lint
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  ruff:
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Install ruff
+        run: pipx install ruff
+
+      - name: Ruff check
+        run: ruff check .
+
+      - name: Ruff format
+        run: ruff format --check .

Makefile

@@ -1,4 +1,9 @@
-.PHONY: test test-all test-unit test-run test-memory-bounds e2e cluster
+.PHONY: test test-all test-unit test-run test-memory-bounds e2e cluster lint
+
+# Lint: ruff check + format check
+lint:
+	uv run ruff check .
+	uv run ruff format --check .
 
 # Default: run unit tests only (no containers needed)
 test: test-unit