ci: report required master checks

Author: CEQ151

.github/workflows/python-engine.yml

@@ -33,4 +33,36 @@ jobs:
           wm = embed_watermark(img, 'hello world', password=42, quality='balanced')
           extracted = extract_watermark(wm, password=42, quality='balanced')
           assert extracted == 'hello world', f'Roundtrip failed: {extracted}'
-          print('All tests passed.')
+          print('All tests passed.')
+
+  mlwm-unit-tests:
+    runs-on: ubuntu-latest
+    name: MLWM unit tests
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
+      - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065
+        with:
+          python-version: '3.10'
+      - name: Run MLWM unit tests when present
+        shell: bash
+        run: |
+          if [ -d blind_watermark/tests ]; then
+            pip install -r blind_watermark/requirements.txt
+            python -m unittest discover -s blind_watermark/tests
+          else
+            echo "No blind_watermark/tests directory exists on this branch yet."
+          fi
+
+  typecheck:
+    runs-on: ubuntu-latest
+    name: Typecheck
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020
+        with:
+          node-version: '20'
+          cache: npm
+      - name: Install dependencies
+        run: npm ci
+      - name: Run TypeScript checks
+        run: npm run typecheck