fix(ci): pass docker-compose.ci.yml override to e2e compose commands

The e2e job was calling plain `docker compose up` without the CI
override file, so it used the base compose bind-mount for MinIO
(./data/minio) which doesn't exist on the runner. The CI override
replaces bind mounts with ephemeral named volumes.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -109,10 +109,10 @@ jobs:
 
       # ── Infrastructure ──────────────────────────────────────────────────────
       - name: Cleanup leftover containers from previous runs
-        run: docker compose down --volumes --remove-orphans || true
+        run: docker compose -f docker-compose.yml -f docker-compose.ci.yml down --volumes --remove-orphans || true
 
       - name: Start DB and MinIO
-        run: docker compose up -d db minio create-buckets
+        run: docker compose -f docker-compose.yml -f docker-compose.ci.yml up -d db minio create-buckets
 
       - name: Wait for DB to be ready
         run: |