docs: update documentation for v0.5.3

- Refresh administrator guide
- Update architecture documentation
- Document Registry Validator
- Document Registry Repair Framework
- Update backup and restore guide
- Refresh CLI documentation
- Update Docker deployment example
- Bump version to v0.5.3

docker-compose.yml

@@ -18,7 +18,7 @@ services:
       - PORT=8654
       - RUST_LOG=info
     hostname: bzod
-    image: nx9-url-shortener:v0.4.0
+    image: nx9-url-shortener:v0.5.3
     ports:
       - mode: ingress
         target: 8654