decomposer: fix validation failure for Migrate the kab_ingestion domain models, ports, GitHub SCM connector, and SharePoint CMS connector into the repository's app/ package.; Wire the migrated ingestion components into the agent application entry point, card, settings, triggers, governance, publication, and validation layers.; Populate every remaining placeholder file with working application, package, test, dependency, and Kubernetes content.; Verify the migrated agent and completed repository end to end.

app/validation.py

@@ -0,0 +1,11 @@
+from .domain.models import Document, IngestionRequest
+
+def validate_request(request: IngestionRequest) -> list[str]:
+    errors = []
+    if not request.source.repository.strip(): errors.append("repository is required")
+    if not request.source.path.strip(): errors.append("path is required")
+    if request.destination not in {"sharepoint"}: errors.append("unsupported destination")
+    return errors
+
+def validate_document(document: Document) -> list[str]:
+    return [] if document.content.strip() else ["document content is empty"]