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/deployment/prepare-secrets.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+# Helper Script to prepare secrets for Gitea manual setup
+# Usage: ./scripts/prepare-secrets.sh
+
+set -euo pipefail
+
+echo "=== Gitea Secrets - Werte zum Kopieren ==="
+echo ""
+echo "1. REGISTRY_USER:"
+echo "─────────────────"
+echo "admin"
+echo ""
+echo ""
+echo "2. REGISTRY_PASSWORD:"
+echo "─────────────────────"
+echo "registry-secure-password-2025"
+echo ""
+echo ""
+echo "3. SSH_PRIVATE_KEY:"
+echo "───────────────────"
+if [ -f ~/.ssh/production ]; then
+    cat ~/.ssh/production
+else
+    echo "⚠️  FEHLER: ~/.ssh/production nicht gefunden!"
+    echo "Bitte SSH Key erstellen oder Pfad anpassen."
+    exit 1
+fi
+echo ""
+echo ""
+echo "=== Nächste Schritte ==="
+echo "1. Gehe zu: https://git.michaelschiemer.de/<username>/michaelschiemer/settings/secrets"
+echo "2. Füge jedes Secret oben einzeln hinzu"
+echo "3. Kopiere die Werte von oben für jedes Secret"
+echo ""