feat: fully defined response code descriptions

Only done on three endpoints. This is a lot of repeated text.

src/service/router.py

@@ -46,7 +46,28 @@ router = APIRouter(
 	response_model=ServiceGetServiceResponse,
 	responses={
 		status.HTTP_200_OK: {"description": "Successful retrieval from database"},
-		status.HTTP_401_UNAUTHORIZED: {"description": "Unauthorized"},
+		status.HTTP_401_UNAUTHORIZED: {
+			"description": "Unauthorized",
+			"content": {
+				"application/json": {
+					"examples": {
+						"awaiting_approval": {
+							"summary": "Organisation has not yet been approved."
+						},
+					}
+				}
+			},
+		},
+		status.HTTP_403_FORBIDDEN: {
+			"description": "Forbidden",
+			"content": {
+				"application/json": {
+					"examples": {
+						"not_root": {"summary": "Not authorised. Must be root user."},
+					}
+				}
+			},
+		},
 	},
 )
 async def get_all_services(