Use v2 API to_jsonable_python

Author: dandavison

temporalio/contrib/pydantic.py

@@ -20,7 +20,6 @@
 )
 
 import pydantic
-from pydantic.json import pydantic_encoder
 
 import temporalio.workflow
 from temporalio.api.common.v1 import Payload
@@ -33,6 +32,11 @@
 )
 from temporalio.worker.workflow_sandbox._restrictions import RestrictionContext
 
+try:
+    from pydantic_core import to_jsonable_python
+except ImportError:
+    from pydantic.json import pydantic_encoder as to_jsonable_python
+
 
 class _PydanticModelTypeConverter(JSONTypeConverter):
     def to_typed_value(self, hint: Type, value: Any) -> Any:
@@ -90,7 +94,7 @@ def to_payload(self, value: Any) -> Optional[Payload]:
         return Payload(
             metadata={"encoding": self.encoding.encode()},
             data=json.dumps(
-                value, separators=(",", ":"), sort_keys=True, default=pydantic_encoder
+                value, separators=(",", ":"), sort_keys=True, default=to_jsonable_python
             ).encode(),
         )