chore(*): add mathlib4 synchronization comments (#19229)
Regenerated from the [port status wiki page](https://github.com/leanprover-community/mathlib/wiki/mathlib4-port-status).
Relates to the following files:
* `algebra.category.Algebra.basic`
* `algebra.category.Algebra.limits`
* `algebra.category.Module.change_of_rings`
* `algebra.module.pid`
* `algebraic_geometry.elliptic_curve.point`
* `algebraic_geometry.morphisms.quasi_compact`
* `algebraic_geometry.morphisms.quasi_separated`
* `algebraic_geometry.projective_spectrum.structure_sheaf`
* `algebraic_topology.fundamental_groupoid.induced_maps`
* `algebraic_topology.fundamental_groupoid.product`
* `algebraic_topology.fundamental_groupoid.simply_connected`
* `analysis.normed.group.SemiNormedGroup.kernels`
* `category_theory.adjunction.lifting`
* `category_theory.monoidal.internal.Module`
* `data.qpf.multivariate.constructions.cofix`
* `geometry.manifold.diffeomorph`
* `geometry.manifold.vector_bundle.smooth_section`
* `geometry.manifold.whitney_embedding`
* `group_theory.finite_abelian`
* `linear_algebra.clifford_algebra.contraction`
* `linear_algebra.exterior_algebra.grading`
* `linear_algebra.matrix.schur_complement`
* `linear_algebra.tensor_algebra.to_tensor_power`
* `model_theory.direct_limit`
* `model_theory.fraisse`
* `number_theory.modular_forms.basic`
* `representation_theory.character`
* `representation_theory.group_cohomology.basic`
* `ring_theory.jacobson`
* `ring_theory.nullstellensatz`
* `topology.metric_space.gromov_hausdorff`
* `topology.vector_bundle.hom`
