`apply_transform_strategy` returns wrong logjac for `DynamicLink → FixedTransform`

[yebai]

In src/transformed_values.jl, the apply_transform_strategy method for a TransformedValue{...,DynamicLink} input with a FixedTransform target returns

(raw_value, transformed_tv, logjac - inv_logjac)

but the documented contract (src/transformed_values.jl:318-321 and the AbstractTransformStrategy docstring) requires the returned logjac to be only the forward Jacobian of the target transform evaluated at raw_value. The inv_logjac term is internal bookkeeping for undoing the input DynamicLink and should not leak into the accumulator.