Remove completed task from documentation

Task #2 about hidden cross-service coupling has been resolved.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Docs/Tasks.md

@@ -1,26 +1,3 @@
-## 2) Hidden cross-service coupling (service imports service)
-- Where found:
-	- [backend/app/services/jail_service.py](backend/app/services/jail_service.py)
-	- [backend/app/services/jail_config_service.py](backend/app/services/jail_config_service.py)
-	- [backend/app/services/history_service.py](backend/app/services/history_service.py)
-- Why this is needed:
-	- Direct service imports create hidden dependency graphs and make testing harder.
-- Goal:
-	- Make service dependencies explicit and injectable.
-- What to do:
-	- Define clear service interfaces.
-	- Pass dependencies via constructor/function parameters.
-	- Remove direct cross-service module imports.
-- Possible traps and issues:
-	- Circular references may surface during refactor.
-- Docs changes needed:
-	- Document service dependency rules and injection style.
-- Doc references:
-	- [Docs/Architekture.md](Docs/Architekture.md)
-	- [Docs/Backend-Development.md](Docs/Backend-Development.md)
-
----
-
 ## 3) Blocklist import flow mixes too many responsibilities
 - Where found:
 	- [backend/app/services/blocklist_service.py](backend/app/services/blocklist_service.py)