refactor create dht value

veilid-python/veilid/api.py

@@ -46,7 +46,7 @@ class RoutingContext(ABC):
 
     @abstractmethod
     async def create_dht_record(
-        self, kind: types.CryptoKind, schema: types.DHTSchema
+        self, schema: types.DHTSchema, kind: Optional[types.CryptoKind] = None
     ) -> types.DHTRecordDescriptor:
         pass
 

veilid-python/veilid/json_api.py

@@ -514,7 +514,7 @@ class _JsonRoutingContext(RoutingContext):
         )
 
     async def create_dht_record(
-        self, kind: CryptoKind, schema: DHTSchema
+        self, schema: DHTSchema, kind: Optional[CryptoKind] = None
     ) -> DHTRecordDescriptor:
         return DHTRecordDescriptor.from_json(
             raise_api_result(

veilid-python/veilid/schema/Request.json

@@ -303,13 +303,15 @@
         {
           "type": "object",
           "required": [
-            "kind",
             "rc_op",
             "schema"
           ],
           "properties": {
             "kind": {
-              "type": "string"
+              "type": [
+                "string",
+                "null"
+              ]
             },
             "rc_op": {
               "type": "string",