Remove Issue #51 from Tasks.md (type-enforcement tracked elsewhere)

Docs/Tasks.md

@@ -1,29 +1,3 @@
-### Issue #51: MEDIUM - Repository Boundary Not Type-Enforced
-
-**Where found**:
-- `backend/app/dependencies.py:20-25` – documented constraint that routers must not import `DbDep` directly
-
-**Why this is needed**:
-Nothing prevents a developer from bypassing the service/repository layer and accessing the DB directly from a router, violating the layered architecture and making the codebase harder to test.
-
-**Goal**:
-Make architectural violations detectable automatically.
-
-**What to do**:
-1. Add a custom `flake8` or `ruff` rule (or `import-linter` boundary) that forbids `app.routers.*` from importing `app.dependencies.DbDep`.
-2. Add a CI check that runs the import boundary linter.
-
-**Possible traps and issues**:
-- `import-linter` requires defining contracts in `pyproject.toml`; coordinate with the existing linting setup.
-
-**Docs changes needed**:
-- `CONTRIBUTING.md`: document the layer boundary rule and linting check.
-
-**Doc references**:
-- `backend/app/dependencies.py` module docstring
-
----
-
 ### Issue #52: MEDIUM - Error Handling Patterns Not Declared on Services
 
 **Where found**: