fix pydantic version incompatibility, closes #74 (#159)

Closes #74 

## By Submitting this PR I confirm:
- I am familiar with the [Contributing Guidelines](https://github.com/NVIDIA/AgentIQ/blob/develop/docs/source/advanced/contributing.md).
- We require that all contributors "sign-off" on their commits. This certifies that the contribution is your original work, or you have rights to submit it under the same license, or a compatible license.
  - Any contribution which contains commits that are not Signed-Off will not be accepted.
- When the PR is ready for review, new or existing tests cover these changes.
- When the PR is ready for review, the documentation is up to date with these changes.

Authors:
  - Zac Wang (https://github.com/zac-wang-nv)

Approvers:
  - David Gardner (https://github.com/dagardner-nv)

URL: #159

Author: zac-wang-nv

pyproject.toml

@@ -35,7 +35,8 @@ dependencies = [
   "opentelemetry-sdk~=1.3",
   "pkginfo~=1.12",
   "platformdirs~=4.3",
-  "pydantic~=2.10",
+  # work-around for arize-phoenix==6.1.0 incompatibility with pydantic==2.11.*, remove once we update arize-phoenix
+  "pydantic==2.10.*",
   "pymilvus~=2.4",
   "PyYAML~=6.0",
   "ragas~=0.2.14",