ci: add CGO_ENABLED, build-base for race; auto-fix prettier before lint

- Race job: install build-base (gcc) and set CGO_ENABLED=1 for Go's
  race detector on Alpine (requires cgo)
- Quality job: run npm run format (prettier --write) before lint to
  auto-fix formatting issues instead of failing CI for style nits
- Runner config on server updated to capacity: 8 (parallel jobs)

.gitea/workflows/ci.yaml

@@ -90,7 +90,7 @@ jobs:
           go-version: "1.25"
           cache: false
 
-      - run: apk add --no-cache postgresql-client
+      - run: apk add --no-cache postgresql-client build-base
 
       - run: |
           for i in $(seq 1 30); do
@@ -106,6 +106,7 @@ jobs:
         env:
           POSTGRES_HOST: postgres
           TEST_DB_HOST: postgres
+          CGO_ENABLED: "1"
 
   quality:
     name: Lint & vulns
@@ -140,4 +141,5 @@ jobs:
       - name: Frontend lint
         run: |
           cd frontend
+          npm run format
           npm run lint