add tensorzero.util reexport UUID (tensorzero#3017)

* add tensorzero.util reexport UUID

* expose UUID only via tensorzero.util

* Update __init__.py

* Cleanup

---------

Co-authored-by: Gabriel Bianconi <1275491+GabrielBianconi@users.noreply.github.com>
Co-authored-by: Gabriel Bianconi <GabrielBianconi@users.noreply.github.com>

Author: yuvraj-kumar-dev

clients/python/tensorzero/util.py

@@ -1,14 +1,17 @@
-import uuid
+from uuid import UUID
 
 from uuid_utils import compat
 
 
-def uuid7() -> uuid.UUID:
+def uuid7() -> UUID:
     """
-    Generate a UUID v7 using uuid_utils compatibility layer.
+    Generate a UUIDv7 using the uuid_utils compatibility layer.
     This ensures type compatibility with the rest of the TensorZero client.
     """
     return compat.uuid7()
 
 
-__all__ = ["uuid7"]
+__all__ = [
+    "UUID",
+    "uuid7",
+]