Task 3: remove config_file_service facade, update direct imports and tests

Docs/Architekture.md

@@ -20,14 +20,14 @@ BanGUI is a two-tier web application with a clear separation between frontend an
 ┌─────────────────────────────┼────────────────────────────────────┐
 │                          Server                                  │
 │  ┌──────────────────────────┴─────────────────────────────────┐  │
-│  │                   Backend (FastAPI)                         │  │
+│  │                   Backend (FastAPI)                        │  │
 │  │  Python 3.12+ · Async · Pydantic v2 · structlog            │  │
 │  └─────┬──────────────┬──────────────┬────────────────────────┘  │
-│        │              │              │                            │
-│  ┌─────┴─────┐  ┌─────┴─────┐  ┌────┴─────┐                     │
-│  │  SQLite   │  │ fail2ban  │  │ External │                     │
-│  │  (App DB) │  │  (Socket) │  │   APIs   │                     │
-│  └───────────┘  └───────────┘  └──────────┘                     │
+│        │              │              │                           │
+│  ┌─────┴─────┐  ┌─────┴─────┐  ┌────┴─────┐                      │
+│  │  SQLite   │  │ fail2ban  │  │ External │                      │
+│  │  (App DB) │  │  (Socket) │  │   APIs   │                      │
+│  └───────────┘  └───────────┘  └──────────┘                      │
 └──────────────────────────────────────────────────────────────────┘
 ```
 

Docs/Tasks.md

@@ -62,6 +62,8 @@ Reference: `Docs/Refactoring.md` for full analysis of each issue.
 
 **Docs changes needed:** Update `Docs/Refactoring.md` and `Docs/Architekture.md` if it mentions this service.
 
+**Status:** Completed ✅
+
 **Why this is needed:** Pure delegation façades add indirection with no abstraction benefit and obscure the true dependencies of the system. The hidden circular dependency via lazy imports is a structural risk — a refactor inside any of the three sub-services could easily break the cycle in unexpected ways.
 
 ---