feat: AI patient onboarding backend and documentation

ai-patient-onboarding/app/services/patient_submission_service.py

@@ -0,0 +1,13 @@
+class PatientSubmissionService:
+
+    async def submit(
+        self,
+        result: dict,
+    ) -> dict:
+        # Destination patient / hospital EHR / HIMS API integration point
+        # In production, this can perform an async HTTP POST to your Hospital Backend
+        return {
+            "success": True,
+            "message": "Patient data successfully submitted to hospital system",
+            "patient_id": result.get("patient_id"),
+        }