feat(stack): replace Organizr with Tatlock UI, remove Netdata

Remove Organizr dashboard and Netdata monitoring:
- Delete stacks/organizr.yml and stacks/netdata.yml
- Delete organizr-widgets/ directory and npm forward-auth config
- Remove organizr database references from postgres-shared docs

Promote Tatlock UI as primary dashboard:
- Move from port 8092 to 9999 (Organizr's port)
- Enable external access at home.schweitz.net
- Update all documentation references

Update service counts: 26 containers across 20 stacks

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

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

setup-new-host.md

@@ -228,7 +228,6 @@ If already logged into another `.schweitz.net` service:
 |------|---------|
 | `stacks/authentik.yml` | Authentik server, worker, and standalone outpost |
 | `stacks/wiki.yml` | Example: Wiki.js container configuration |
-| `npm-configs/organizr-forward-auth.conf` | Legacy reference (has bugs, do not use directly) |
 
 ## Architecture Overview