fix: load numbered migration module dynamically

backend/tests/test_deps_import.py

@@ -0,0 +1,10 @@
+"""Regression coverage for application dependency module imports."""
+
+from pathlib import Path
+
+
+def test_dependency_module_compiles():
+    """Database initialization dependencies remain valid Python syntax."""
+    module_path = Path(__file__).parents[1] / "app" / "core" / "deps.py"
+
+    compile(module_path.read_text(encoding="utf-8"), str(module_path), "exec")