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

deployment/ansible/playbooks/restart-gitea-complete.yml

@@ -0,0 +1,95 @@
+---
+# Restart Gitea Complete - Stoppt und startet Gitea neu um alle Konfigurationsänderungen zu übernehmen
+- name: Restart Gitea Complete
+  hosts: production
+  gather_facts: no
+  become: no
+  vars:
+    gitea_stack_path: "{{ stacks_base_path }}/gitea"
+    gitea_url: "https://{{ gitea_domain }}"
+
+  tasks:
+    - name: Check current Gitea environment variables
+      ansible.builtin.shell: |
+        cd {{ gitea_stack_path }}
+        docker compose exec -T gitea env | grep -E 'GITEA__database__' | sort || echo "Could not read environment variables"
+      register: gitea_env_before
+      changed_when: false
+      failed_when: false
+
+    - name: Display current environment variables
+      ansible.builtin.debug:
+        msg: |
+          Current Gitea Database Environment Variables:
+          {{ gitea_env_before.stdout }}
+
+    - name: Stop Gitea container completely
+      ansible.builtin.shell: |
+        cd {{ gitea_stack_path }}
+        docker compose stop gitea
+      register: gitea_stop
+      changed_when: gitea_stop.rc == 0
+
+    - name: Wait for Gitea to stop
+      ansible.builtin.pause:
+        seconds: 5
+
+    - name: Start Gitea container
+      ansible.builtin.shell: |
+        cd {{ gitea_stack_path }}
+        docker compose up -d gitea
+      register: gitea_start
+      changed_when: gitea_start.rc == 0
+
+    - name: Wait for Gitea to be ready
+      ansible.builtin.wait_for:
+        timeout: 60
+        delay: 5
+
+    - name: Check Gitea health after restart
+      ansible.builtin.uri:
+        url: "{{ gitea_url }}/api/healthz"
+        method: GET
+        validate_certs: false
+        timeout: 10
+      register: gitea_health_after
+      changed_when: false
+      failed_when: false
+      retries: 5
+      delay: 5
+
+    - name: Check environment variables after restart
+      ansible.builtin.shell: |
+        cd {{ gitea_stack_path }}
+        docker compose exec -T gitea env | grep -E 'GITEA__database__' | sort || echo "Could not read environment variables"
+      register: gitea_env_after
+      changed_when: false
+      failed_when: false
+
+    - name: Display restart results
+      ansible.builtin.debug:
+        msg: |
+          ================================================================================
+          GITEA COMPLETE RESTART - RESULTS
+          ================================================================================
+          
+          Gitea Health After Restart:
+          - Status: {{ gitea_health_after.status | default('TIMEOUT') }}
+          {% if gitea_health_after.status | default(0) == 200 %}
+          ✅ Gitea is healthy after restart
+          {% else %}
+          ❌ Gitea health check failed (Status: {{ gitea_health_after.status | default('TIMEOUT') }})
+          {% endif %}
+          
+          Environment Variables After Restart:
+          {{ gitea_env_after.stdout }}
+          
+          {% if 'MAX_OPEN_CONNS' in gitea_env_after.stdout %}
+          ✅ Connection pool settings are present
+          {% else %}
+          ⚠️  Connection pool settings NOT found in environment variables
+          → Check docker-compose.yml configuration
+          {% endif %}
+          
+          ================================================================================
+