chore(*): add mathlib4 synchronization comments (#19208)
Regenerated from the [port status wiki page](https://github.com/leanprover-community/mathlib/wiki/mathlib4-port-status).
Relates to the following files:
* `algebraic_geometry.locally_ringed_space.has_colimits`
* `analysis.bounded_variation`
* `analysis.fourier.add_circle`
* `analysis.fourier.poisson_summation`
* `probability.borel_cantelli`
* `probability.kernel.disintegration`
* `probability.martingale.borel_cantelli`
* `probability.martingale.convergence`
* `probability.martingale.optional_stopping`
* `probability.martingale.upcrossing`
* `ring_theory.dedekind_domain.integral_closure`
* `ring_theory.localization.norm`
* `ring_theory.norm`
* `ring_theory.polynomial.eisenstein.is_integral`
* `ring_theory.trace`
