Update django_mongodb_backend/routers.py

Co-authored-by: Copilot <[email protected]>

Author: aclark4life

django_mongodb_backend/routers.py

@@ -22,6 +22,12 @@ def allow_migrate(self, db, app_label, model_name=None, **hints):
 
 # This function is intended to be monkey-patched as a method of ConnectionRouter.
 def kms_provider(self, model, *args, **kwargs):
+    """
+    Monkey-patched method for ConnectionRouter to resolve a KMS provider for a given model.
+    Iterates through all configured database routers, calling their `kms_provider` method (if present)
+    to determine the appropriate Key Management Service (KMS) provider for the specified model.
+    Returns the first non-None result found. Raises ImproperlyConfigured if no provider is found.
+    """
     for router in self.routers:
         func = getattr(router, "kms_provider", None)
         if func and callable(func):