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/deploy-gitea-stack-config.yml

@@ -0,0 +1,60 @@
+---
+# Deploy Gitea Stack Configuration
+# Updates docker-compose.yml and restarts containers with new settings
+- name: Deploy Gitea Stack Configuration
+  hosts: production
+  gather_facts: yes
+  become: no
+  vars:
+    gitea_stack_path: "{{ stacks_base_path }}/gitea"
+    traefik_auto_restart: false
+    gitea_auto_restart: false
+
+  tasks:
+    - name: Check if Gitea stack directory exists
+      ansible.builtin.stat:
+        path: "{{ gitea_stack_path }}"
+      register: gitea_stack_dir
+      failed_when: false
+
+    - name: Fail if Gitea stack directory does not exist
+      ansible.builtin.fail:
+        msg: "Gitea stack directory does not exist: {{ gitea_stack_path }}"
+      when: not gitea_stack_dir.stat.exists
+
+    - name: Sync Gitea docker-compose.yml
+      ansible.builtin.synchronize:
+        src: "{{ playbook_dir }}/../../stacks/gitea/docker-compose.yml"
+        dest: "{{ gitea_stack_path }}/docker-compose.yml"
+        mode: push
+      register: compose_synced
+
+    - name: Restart Gitea and Postgres containers to apply new configuration
+      ansible.builtin.shell: |
+        cd {{ gitea_stack_path }}
+        docker compose up -d --force-recreate gitea postgres
+      register: gitea_restart
+      changed_when: gitea_restart.rc == 0
+      when: compose_synced.changed | default(false) | bool
+
+    - name: Wait for Gitea to be ready
+      ansible.builtin.wait_for:
+        timeout: 60
+        delay: 5
+      when: gitea_restart.changed | default(false) | bool
+
+    - name: Display result
+      ansible.builtin.debug:
+        msg: |
+          ================================================================================
+          GITEA STACK CONFIGURATION DEPLOYED
+          ================================================================================
+          
+          Changes applied:
+          - Gitea Connection Pool: MAX_OPEN_CONNS=50, MAX_IDLE_CONNS=30, CONN_MAX_LIFETIME=600, CONN_MAX_IDLE_TIME=300
+          - Postgres Timeouts: authentication_timeout=180s, statement_timeout=30s, idle_in_transaction_timeout=30s
+          
+          Containers restarted: {{ 'YES' if (gitea_restart.changed | default(false) | bool) else 'NO (no changes)' }}
+          
+          ================================================================================
+