Upstream bug in `transformers` breaks use of `AutoModelForMaskGeneration` class to load SAM models
Simple fix - directly load the model with `SamModel` class instead.
See upstream issue https://github.com/huggingface/transformers/issues/38228
## Summary
- Fallback to new classification API if legacy probe fails
- Method to read model metadata
- Created `StrippedModelOnDisk` class for testing
- Test to verify only a single config `matches` with a model
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## Checklist
- [ ] _The PR has a short but descriptive title, suitable for a
changelog_
- [ ] _Tests added / updated (if applicable)_
- [ ] _Documentation added / updated (if applicable)_
- [ ] _Updated `What's New` copy (if doing a release after this PR)_
For example:
```py
my_field: Literal["foo", "bar"] | None = InputField(default=None)
```
Previously, this would cause a field parsing error and prevent the app from loading.
Two fixes:
- This type annotation and resultant schema are now parsed correctly
- Error handling added to template building logic to prevent the hang at startup when an error does occur
