downgrade pydantic

Signed-off-by: shanhaikang.shk <shanhaikang.shk@oceanbase.com>

Author: GITHUBear

README.md

@@ -15,7 +15,7 @@ poetry install
 - install with pip:
 
 ```shell
-pip install pyobvector==0.2.1
+pip install pyobvector==0.2.2
 ```
 
 ## Build Doc

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pyobvector"
-version = "0.2.1"
+version = "0.2.2"
 description = "A python SDK for OceanBase Vector Store, based on SQLAlchemy, compatible with Milvus API."
 authors = ["shanhaikang.shk <shanhaikang.shk@oceanbase.com>"]
 readme = "README.md"
@@ -12,7 +12,7 @@ sqlalchemy = ">=1.4,<2.0.36"
 pymysql = "^1.1.1"
 aiomysql = "^0.2.0"
 sqlglot = "^26.0.1"
-pydantic = "^2.10.4"
+pydantic = ">=2.7.4,<2.8.0"
 
 [tool.poetry.group.dev.dependencies]
 pytest = "^8.2.2"