Add mailhog service and browsers matrix

.github/workflows/functional-tests.yml

@@ -120,11 +120,15 @@ jobs:
           POSTGRES_DB: postgres
         ports: ["5432:5432"]
         options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
+      mailhog:
+        image: mailhog/mailhog
+        ports: ["1025:1025", "8025:8025"]
 
     strategy:
       max-parallel: 4
       matrix:
         python-version: ["3.11"]
+        playwright-browser: ["chromium"]
 
     steps:
       - uses: actions/checkout@v4