ci: run architecture validators via 'uv run python' so they use the venv

ci-arch-cqrs and ci-arch-clean invoked their scripts as bare ./script.py,
which runs under the system Python via the shebang.  validate_cqrs.py and
check_architecture.py import PyYAML (a venv-only dependency), so they failed
with ModuleNotFoundError once the dependency setup stopped leaving the venv
active in the ambient environment.  Invoke them with 'uv run python' (matching
ci-arch-imports), which resolves the project venv.  file-sizes aligned too.

Author: fgogolli

makefiles/ci.mk

@@ -26,21 +26,24 @@ ci-quality: ci-quality-ruff ci-quality-pyright  ## Run all enforced code quality
 ci-quality-full: ci-quality-ruff ci-quality-ruff-optional ci-quality-pyright  ## Run all code quality checks including optional
 
 # Individual architecture quality targets (with tool names)
+# Run the validators via `uv run` so they use the project venv (which has
+# PyYAML etc.), not the ambient system Python.  A bare `./script.py` relied on
+# the venv being pre-activated by an earlier step, which no longer holds.
 ci-arch-cqrs:  ## Run CQRS pattern validation
 	@echo "Running CQRS pattern validation..."
-	./dev-tools/quality/validate_cqrs.py
+	uv run python ./dev-tools/quality/validate_cqrs.py
 
 ci-arch-clean:  ## Run Clean Architecture dependency validation
 	@echo "Running Clean Architecture validation..."
-	./dev-tools/quality/check_architecture.py
+	uv run python ./dev-tools/quality/check_architecture.py
 
 ci-arch-imports: dev-install  ## Run import validation
 	@echo "Running import validation..."
 	uv run python ./dev-tools/quality/validate_imports.py
 
 ci-arch-file-sizes:  ## Check file size compliance
 	@echo "Running file size checks..."
-	./dev-tools/quality/dev_tools_runner.py check-file-sizes --warn-only
+	uv run python ./dev-tools/quality/dev_tools_runner.py check-file-sizes --warn-only
 
 ci-arch-lint-imports: dev-install  ## Run import-linter layer-boundary contracts
 	@echo "Running import-linter layer-boundary checks..."