add missing endpoints

kontor-api/src/schema/tysc/vendor.py

@@ -0,0 +1,32 @@
+"""
+class and function for json response objects for Vendor.
+"""
+from datetime import datetime
+
+from pydantic import BaseModel
+
+from src.db.models.tysc import Vendor
+
+
+class VendorResponse(BaseModel):
+    """
+    Pydantic model for Vendor reponse object.
+    """
+    id: str
+    created_date: datetime
+    last_modified_date: datetime
+    version: int
+    name: str
+
+def to_response(vendor: Vendor) -> VendorResponse:
+    """
+    convert database object Vendor to response object VendorResponse.
+    """
+    reponse: VendorResponse = VendorResponse(
+        id=vendor.id,
+        created_date=vendor.created_date,
+        last_modified_date=vendor.last_modified_date,
+        version=vendor.version,
+        name=vendor.name
+    )
+    return reponse