CI: split test and build workflows, run build only on git push tag

.forgejo/workflows/build.yaml

@@ -1,5 +1,7 @@
 on:
   push:
+    tags:
+      - "**"
   workflow_dispatch:
     inputs:
       verbose:
@@ -7,11 +9,6 @@ on:
         required: false
         default: false
         type: boolean
-      build:
-        description: "Build container"
-        required: true
-        default: false
-        type: boolean
 
 jobs:
   test:

.forgejo/workflows/test.yaml

@@ -0,0 +1,34 @@
+on:
+  push:
+  workflow_dispatch:
+    inputs:
+      verbose:
+        description: "Verbose"
+        required: false
+        default: false
+        type: boolean
+
+jobs:
+  test:
+    runs-on: container
+    container:
+      image: code.philo.ydns.eu/philorg/treetrail-backend-ci
+      volumes:
+        - "uv_cache:/root/.cache/uv"
+        - "ca-cert:/etc/containers/certs.d"
+    services:
+      treetrail-database:
+        image: code.philo.ydns.eu/philorg/treetrail-database
+    steps:
+      - name: Echo env
+        if: ${{ inputs.verbose }}
+        run: |
+          echo '${{ toJSON(env) }}'
+
+      - uses: actions/checkout@v4
+
+      - name: Install app with 'uv pip install'
+        run: uv pip install --python=$UV_PROJECT_ENVIRONMENT --no-deps .
+
+      - name: Run tests (API call)
+        run: pytest -s tests/basic.py