Update pydantic dependency to support python 3.14

Author: dirkkul

setup.cfg

@@ -37,7 +37,7 @@ install_requires =
     httpx>=0.26.0,<0.29.0
     validators>=0.34.0,<1.0.0
     authlib>=1.2.1,<2.0.0
-    pydantic>=2.8.0,<3.0.0
+    pydantic>=2.12.0,<3.0.0
     grpcio>=1.59.5,<1.80.0
     protobuf>=4.21.6,<7.0.0
     deprecation>=2.1.0,<3.0.0