feat: add comprehensive access logging to Graylog with GeoIP

- Add fluent-bit inputs for Caddy access logs (JSON) and SSH logs
- Create GeoIP task to download MaxMind GeoLite2-City database
- Mount GeoIP database in Graylog container
- Enable Gitea access logging via environment variables
- Add parsers.conf for Caddy JSON log parsing
- Remove unused nosql/redis container and configuration

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

ansible/roles/podman/templates/fluent-bit/parsers.conf.j2

@@ -0,0 +1,5 @@
+[PARSER]
+    Name        caddy_json
+    Format      json
+    Time_Key    ts
+    Time_Format %s.%L