fix: use external network for dev compose to avoid label conflicts

The portfolio_dev network was created manually by the pipeline, causing
docker-compose to fail with label mismatch errors. Now:
- Network is marked as external in compose (compose doesn't try to own it)
- Network creation moved before compose up in the pipeline
- Redundant network check later in pipeline removed

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

.gitea/workflows/dev-deploy.yml

@@ -70,10 +70,15 @@ jobs:
           echo "🔄 Removing old images to force re-pull..."
           docker rmi postgres:15-alpine redis:7-alpine 2>/dev/null || true
           
+          # Ensure networks exist before compose starts (network is external)
+          echo "🌐 Ensuring networks exist..."
+          docker network create portfolio_dev 2>/dev/null || true
+          docker network create proxy 2>/dev/null || true
+
           # Pull images with correct architecture (Docker will auto-detect)
           echo "📥 Pulling images for current architecture..."
           docker compose -f $COMPOSE_FILE pull postgres redis
-          
+
           # Start containers
           echo "📦 Starting PostgreSQL and Redis containers..."
           docker compose -f $COMPOSE_FILE up -d postgres redis
@@ -192,25 +197,6 @@ jobs:
             fi
           fi
           
-          # Ensure networks exist
-          echo "🌐 Checking for networks..."
-          if ! docker network inspect proxy >/dev/null 2>&1; then
-            echo "⚠️ Proxy network not found, creating it..."
-            docker network create proxy 2>/dev/null || echo "Network might already exist or creation failed"
-          else
-            echo "✅ Proxy network exists"
-          fi
-          
-          if ! docker network inspect portfolio_dev >/dev/null 2>&1; then
-            echo "⚠️ Portfolio dev network not found, creating it..."
-            docker network create portfolio_dev 2>/dev/null || echo "Network might already exist or creation failed"
-          else
-            echo "✅ Portfolio dev network exists"
-          fi
-          
-          # Connect proxy network to portfolio_dev network if needed
-          # (This allows the app to access both proxy and DB/Redis)
-          
           # Start new container with updated image
           echo "🆕 Starting new dev container..."
           docker run -d \