chore(*): add mathlib4 synchronization comments (#19162)
Regenerated from the [port status wiki page](https://github.com/leanprover-community/mathlib/wiki/mathlib4-port-status).
Relates to the following files:
* `algebra.category.Module.colimits`
* `algebra.category.Module.monoidal.closed`
* `algebra.homology.local_cohomology`
* `analysis.box_integral.basic`
* `analysis.box_integral.divergence_theorem`
* `analysis.box_integral.integrability`
* `analysis.calculus.parametric_integral`
* `analysis.convex.integral`
* `analysis.convex.specific_functions.deriv`
* `analysis.special_functions.exponential`
* `analysis.special_functions.pow.deriv`
* `analysis.special_functions.trigonometric.arctan`
* `analysis.special_functions.trigonometric.complex`
* `analysis.special_functions.trigonometric.complex_deriv`
* `analysis.special_functions.trigonometric.series`
* `category_theory.closed.functor_category`
* `category_theory.with_terminal`
* `combinatorics.additive.behrend`
* `combinatorics.derangements.exponential`
* `data.set.ncard`
* `field_theory.splitting_field.is_splitting_field`
* `group_theory.schreier`
* `group_theory.specific_groups.quaternion`
* `linear_algebra.quadratic_form.complex`
* `linear_algebra.quadratic_form.isometry`
* `linear_algebra.quadratic_form.prod`
* `linear_algebra.quadratic_form.real`
* `measure_theory.constructions.prod.integral`
* `measure_theory.function.ae_eq_of_integral`
* `measure_theory.group.fundamental_domain`
* `measure_theory.integral.average`
* `measure_theory.integral.set_integral`
* `measure_theory.measure.haar.inner_product_space`
* `measure_theory.measure.with_density_vector_measure`
* `representation_theory.Action`
* `ring_theory.dedekind_domain.factorization`
* `ring_theory.localization.away.adjoin_root`
* `ring_theory.valuation.valuation_ring`
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