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>

stacks/tatlock-ui.yml

@@ -1,9 +1,9 @@
 version: '3.8'
 
 # Tatlock UI - Home Lab Dashboard (Flutter Web)
-# Port: 8092 (HTTP)
+# Port: 9999 (HTTP)
 # GPU: No
-# External: home.schweitz.net (future, replacing Organizr)
+# External: home.schweitz.net
 # Storage: None (stateless static web app)
 #
 # Container image built from: git.schweitz.internal/jpmschweitzer/tatlock-ui
@@ -15,7 +15,7 @@ services:
     container_name: tatlock-ui
     restart: unless-stopped
     ports:
-      - "8092:80"
+      - "9999:80"
     networks:
       - docker-dataplane
     labels:
@@ -39,6 +39,6 @@ networks:
     name: docker-dataplane
 
 # Access:
-# - Internal: http://tower-of-joy:8092
-# - Mesh VPN: http://10.99.0.1:8092
-# - Future: https://home.schweitz.net (after NPM switch from Organizr)
+# - Internal: http://tower-of-joy:9999
+# - Mesh VPN: http://10.99.0.1:9999
+# - External: https://home.schweitz.net