updated toml to use 0.5.34 and python 3.12

[StevenBtw]

the python bump would need to be discussed

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Summary by cubic

Pin grafeo to 0.5.34 and raise the minimum Python version to 3.12 to ensure compatibility and reproducible installs for the Grafeo integration.

• Migration
  • Upgrade local, CI, and runtime environments to Python 3.12.
  • Recreate virtual environments after the upgrade.

^{Written for commit 9d6c9a7. Summary will update on new commits.}