Add Gitea to infrastructure documentation

- Added Gitea (LXC 127) to service map
- Added changelog entry for Gitea setup
- Traefik routing configured for git.kavcorp.com

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

docs/CHANGELOG.md

@@ -23,6 +23,16 @@
   - Services: immich-web.service, immich-ml.service
   - Tagged: community-script, photos
 
+- **Gitea**: Added self-hosted Git server
+  - LXC 127 on pm4
+  - IP: 10.4.2.7:3000
+  - Domain: git.kavcorp.com
+  - Traefik config: `/etc/traefik/conf.d/gitea.yaml`
+  - Config: `/etc/gitea/app.ini`
+  - Push-to-create enabled for users and orgs
+  - Initial repo: `proxmox-infra` (infrastructure documentation)
+  - Tagged: community-script, git
+
 ### Infrastructure Maintenance
 - **Traefik (LXC 104)**: Fixed disk full issue
   - Truncated 895MB access log that filled 2GB rootfs