chore(*): add mathlib4 synchronization comments (#19165)
Regenerated from the [port status wiki page](https://github.com/leanprover-community/mathlib/wiki/mathlib4-port-status).
Relates to the following files:
* `algebra.lie.classical`
* `analysis.calculus.bump_function_inner`
* `analysis.calculus.monotone`
* `analysis.calculus.parametric_interval_integral`
* `analysis.normed_space.quaternion_exponential`
* `analysis.special_functions.trigonometric.arctan_deriv`
* `analysis.special_functions.trigonometric.bounds`
* `category_theory.bicategory.coherence_tactic`
* `category_theory.monoidal.Mon_`
* `category_theory.monoidal.coherence`
* `category_theory.monoidal.subcategory`
* `category_theory.sites.compatible_plus`
* `category_theory.sites.types`
* `data.json`
* `data.real.pi.leibniz`
* `geometry.euclidean.angle.unoriented.right_angle`
* `linear_algebra.tensor_algebra.basic`
* `measure_theory.covering.density_theorem`
* `measure_theory.covering.differentiation`
* `measure_theory.covering.liminf_limsup`
* `measure_theory.covering.one_dim`
* `measure_theory.decomposition.lebesgue`
* `measure_theory.decomposition.radon_nikodym`
* `measure_theory.function.continuous_map_dense`
* `measure_theory.function.l2_space`
* `measure_theory.function.special_functions.arctan`
* `measure_theory.integral.interval_average`
* `measure_theory.integral.interval_integral`
* `measure_theory.integral.peak_function`
* `measure_theory.measure.finite_measure`
* `measure_theory.measure.haar.quotient`
* `measure_theory.measure.probability_measure`
* `probability.integration`
* `ring_theory.class_group`
* `ring_theory.roots_of_unity.basic`
* `ring_theory.roots_of_unity.complex`
* `topology.order.hom.esakia`
