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/verify-env-loading.yml

@@ -0,0 +1,58 @@
+---
+- name: Verify Environment Variable Loading
+  hosts: production
+  gather_facts: no
+  become: no
+
+  vars:
+    application_stack_dest: "{{ app_stack_path | default(stacks_base_path + '/production') }}"
+    application_compose_suffix: "production.yml"
+
+  tasks:
+    - name: Check if docker-compose.production.yml has env_file with absolute path
+      shell: |
+        grep -A 2 "env_file:" {{ application_stack_dest }}/docker-compose.production.yml | head -5
+      delegate_to: "{{ inventory_hostname }}"
+      register: env_file_check
+      changed_when: false
+
+    - name: Display env_file configuration
+      debug:
+        msg: |
+          env_file configuration in docker-compose.production.yml:
+          {{ env_file_check.stdout }}
+
+    - name: Wait for container to be running
+      pause:
+        seconds: 3
+
+    - name: Check all environment variables in queue-worker container
+      shell: |
+        timeout 5 docker compose -f {{ application_stack_dest }}/docker-compose.base.yml -f {{ application_stack_dest }}/docker-compose.{{ application_compose_suffix }} exec -T queue-worker env 2>&1 | grep -E "^DB_|^APP_|^REDIS_" | sort || echo "CONTAINER_NOT_RUNNING"
+      register: all_env_vars
+      changed_when: false
+      failed_when: false
+      ignore_errors: yes
+      retries: 3
+      delay: 2
+
+    - name: Display all environment variables
+      debug:
+        msg: |
+          All DB/APP/REDIS Environment Variables in queue-worker:
+          {{ all_env_vars.stdout }}
+
+    - name: Test if we can read .env file from container
+      shell: |
+        docker compose -f {{ application_stack_dest }}/docker-compose.base.yml -f {{ application_stack_dest }}/docker-compose.{{ application_compose_suffix }} exec -T queue-worker cat /home/deploy/deployment/stacks/production/.env 2>&1 | head -20 || echo "FILE_NOT_READABLE"
+      register: env_file_read_test
+      changed_when: false
+      failed_when: false
+      ignore_errors: yes
+
+    - name: Display .env file read test
+      debug:
+        msg: |
+          .env file read test from container:
+          {{ env_file_read_test.stdout }}
+