[TASK] Add CI workflow

.github/workflows/ci.yml

@@ -0,0 +1,45 @@
+name: CI
+
+on:
+  push:
+    branches:
+     - master
+    tags:
+      - '*'
+  pull_request:
+    branches:
+     - master
+  schedule:
+    - cron: '0 7 * * *'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    defaults:
+      run:
+        working-directory: ./test
+
+    env:
+      BUILD_IMAGE_TAG: ${{ github.run_id }}
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Build & Start
+        run: docker compose up --detach mysql
+
+      - name: Dump & Diff
+        env:
+          MYSQL_PWD: root
+        run: >
+          docker compose exec mysql
+            mysqldump
+              --compact
+              --skip-extended-insert
+              db
+            |
+            diff --unified expected.sql -
+
+      - name: Cleanup
+        run: docker compose down -rmi --volumes