phase6: add provider abstraction, mvp adapter, and ingestion sync tasks

apps/providers/registry.py

@@ -0,0 +1,17 @@
+from django.conf import settings
+
+from apps.providers.adapters.mvp_provider import MvpDemoProviderAdapter
+from apps.providers.exceptions import ProviderNotFoundError
+
+
+PROVIDER_REGISTRY = {
+    MvpDemoProviderAdapter.namespace: MvpDemoProviderAdapter,
+}
+
+
+def get_provider(namespace: str | None = None):
+    provider_namespace = namespace or settings.PROVIDER_DEFAULT_NAMESPACE
+    provider_cls = PROVIDER_REGISTRY.get(provider_namespace)
+    if not provider_cls:
+        raise ProviderNotFoundError(f"Unknown provider namespace: {provider_namespace}")
+    return provider_cls()