adapter: support log and sqrt transforms

[paul-buerkner]

This PR adds support for log and sqrt transforms as requested by @stefanradev93.

@LarsKue I noticed that we are using two different patterns to deal with keys in the adapter. One that uses keys directly in the internal adapter transforms (e.g., expand_dims) and another that loops over the keys inside the main Adapter (e.g., as_set). Is this international? If so, when shall we apply which pattern?

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Attention: Patch coverage is 96.15385% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
bayesflow/adapters/transforms/sqrt.py	83.33%	2 Missing ⚠️

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Files with missing lines	Coverage Δ
bayesflow/adapters/adapter.py	76.39% <100.00%> (+1.90%)	⬆️
bayesflow/adapters/transforms/__init__.py	100.00% <100.00%> (ø)
bayesflow/adapters/transforms/expand_dims.py	100.00% <100.00%> (ø)
bayesflow/adapters/transforms/log.py	100.00% <100.00%> (ø)
bayesflow/adapters/transforms/sqrt.py	83.33% <83.33%> (ø)

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[LarsKue]

Thanks for the PR! You can just use ElementwiseTransform without filtering for keys manually, this is already implemented by the FilterTransform. You can copy the pattern from AsSet. The ExpandDims transform is also incorrectly implemented.

[paul-buerkner]

Thanks! That makes sense!

[paul-buerkner]

Done. Can you check again @LarsKue ?

[LarsKue]

Thank you for the changes. I think this looks good 👍

[paul-buerkner]

Great! Merging now.