Bump Pydantic to 2.7.2

[MaxTuecke]

Fixes #228

Overview

Bumps pydantic from 1.10.13 to 2.7.2 Bumps mypy from 0.981 to 1.10.0

Discussion

• Added helper unique_items_validator in utils/pydantic.py to replace the deprecated unique_items argument for pydantic fields
• Added helper const_item_validator in utils/pydantic.py to replace the deprecated const argument for pydantic fields
• Changed to strict Optional typing since mypy 1.10 has changed its default to no_implicit_optional=True.
• Added vulnerability ignore for 70612 since we are only using jinja2 client side.

Testing

All unit tests passing with no new warnings. Old gardens / entrypoints are still working with the new schemas.

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📚 Documentation preview 📚: https://garden-ai--476.org.readthedocs.build/en/476/

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 90.29126% with 10 lines in your changes missing coverage. Please review.

Project coverage is 76.44%. Comparing base (cb448fb) to head (8515d7e). Report is 23 commits behind head on main.

Files with missing lines	Patch %	Lines
garden_ai/utils/pydantic.py	68.18%	7 Missing :warning:
garden_ai/scripts/save_session_and_metadata.py	0.00%	2 Missing :warning:
garden_ai/datacite.py	97.22%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #476 +/- ## ======================================= Coverage 76.43% 76.44% ======================================= Files 51 52 +1 Lines 3421 3452 +31 ======================================= + Hits 2615 2639 +24 - Misses 806 813 +7 ```

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