Fixing a False “TypeScript Types Removed” Event in npmx

npmx fixed a timeline bug that could falsely show TypeScript types as removed based only on package metadata.

The new logic checks candidate versions’ files after the fast metadata pass, so published declaration files are accounted for.

Analysis failures remain nonfatal, and the change is backed by new regression tests.

This makes npm package timelines more accurate for developers evaluating TypeScript compatibility and typings support.