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/install/install-php85.sh

@@ -0,0 +1,60 @@
+#!/bin/bash
+set -e
+
+echo "=== PHP 8.5 CLI Installation Script ==="
+echo ""
+
+# Check if running as root
+if [ "$EUID" -ne 0 ]; then
+    echo "Please run as root or with sudo: sudo bash install-php85.sh"
+    exit 1
+fi
+
+# Step 1: Install prerequisites
+echo "Step 1: Installing prerequisites..."
+apt-get update
+apt-get install -y lsb-release ca-certificates curl
+
+# Step 2: Add Ondrej Surý PHP PPA
+echo "Step 2: Adding PHP PPA repository..."
+curl -sSL -o /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg
+echo "deb https://packages.sury.org/php/ $(lsb_release -sc) main" > /etc/apt/sources.list.d/php.list
+apt-get update
+
+# Step 3: Install PHP 8.5 CLI with extensions
+echo "Step 3: Installing PHP 8.5 CLI and extensions..."
+apt-get install -y \
+    php8.5-cli \
+    php8.5-common \
+    php8.5-opcache \
+    php8.5-curl \
+    php8.5-mbstring \
+    php8.5-xml \
+    php8.5-zip \
+    php8.5-bcmath \
+    php8.5-gd \
+    php8.5-mysql \
+    php8.5-pgsql \
+    php8.5-sqlite3 \
+    php8.5-redis \
+    php8.5-apcu \
+    php8.5-intl \
+    php8.5-soap \
+    php8.5-xdebug
+
+# Step 4: Verify installation
+echo ""
+echo "=== Installation Complete ==="
+echo ""
+echo "PHP 8.5 Version:"
+php8.5 -v
+echo ""
+echo "Installed Extensions:"
+php8.5 -m | head -20
+echo "... (more extensions available)"
+echo ""
+echo "Usage:"
+echo "  Run PHP 8.5 explicitly: php8.5 script.php"
+echo "  Set as default: sudo update-alternatives --set php /usr/bin/php8.5"
+echo "  Check version: php8.5 -v"
+echo ""