I want to manage my database items like I manage my code. I get a hierarchical folder structure of items with support for goToDefinition and findReferences, and when I update my code I can run something that generates the diff migration. That way I can see historical context of what has changed and when, rather than looking through migration files grepping for the fields or function names of interest.

The migration log ends up being your changelog, except that it's not a simple diff (create or replace function with the whole definition of the function rather than the diff).