fix: Gitea Traefik routing and connection pool optimization

- Remove middleware reference from Gitea Traefik labels (caused routing issues)
- Optimize Gitea connection pool settings (MAX_IDLE_CONNS=30, authentication_timeout=180s)
- Add explicit service reference in Traefik labels
- Fix intermittent 504 timeouts by improving PostgreSQL connection handling

Fixes Gitea unreachability via git.michaelschiemer.de

scripts/test/test-simple.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+
+echo "🧪 Testing Upload System with CSRF Protection"
+echo "=============================================="
+
+BASE_URL="https://localhost"
+USER_AGENT="Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36"
+
+echo ""
+echo "📋 Test 1: CSRF Token Generation"
+echo "--------------------------------"
+
+CSRF_RESPONSE=$(curl -k -s -H "User-Agent: $USER_AGENT" -H "Accept: application/json" "$BASE_URL/api/csrf/token?action=/api/images&method=post")
+
+if [ $? -eq 0 ] && [[ $CSRF_RESPONSE == *"form_id"* ]]; then
+    echo "✅ CSRF API working"
+    echo "Response: $CSRF_RESPONSE"
+else
+    echo "❌ CSRF API failed"
+    exit 1
+fi
+
+echo ""
+echo "🌐 Test 2: Test Page Check"
+echo "-------------------------"
+
+HTTP_STATUS=$(curl -k -s -o /dev/null -w "%{http_code}" -H "User-Agent: $USER_AGENT" "$BASE_URL/admin/test/upload")
+
+if [ "$HTTP_STATUS" = "200" ]; then
+    echo "✅ Test page accessible: $BASE_URL/admin/test/upload"
+else
+    echo "❌ Test page not accessible (HTTP $HTTP_STATUS)"
+fi
+
+echo ""
+echo "📊 Summary: System ready for browser testing!"
+echo "Open: $BASE_URL/admin/test/upload"