chore - Add pydantic lib to type checking (#9086)

Co-authored-by: openhands <openhands@all-hands.dev>

dev_config/python/.pre-commit-config.yaml

@@ -40,7 +40,7 @@ repos:
     hooks:
       - id: mypy
         additional_dependencies:
-          [types-requests, types-setuptools, types-pyyaml, types-toml, types-docker, lxml]
+          [types-requests, types-setuptools, types-pyyaml, types-toml, types-docker, pydantic, lxml]
         # To see gaps add `--html-report mypy-report/`
         entry: mypy --config-file dev_config/python/mypy.ini openhands/
         always_run: true

dev_config/python/mypy.ini

@@ -7,5 +7,9 @@ warn_unreachable = True
 warn_redundant_casts = True
 no_implicit_optional = True
 strict_optional = True
+
 # Exclude third-party runtime directory from type checking
 exclude = third_party/
+
+[mypy-openhands.memory.condenser.impl.*]
+disable_error_code = override