## What
Rebinds the marketplace's expertise facet from `deploymentExpertise`
(Cloud / Self-host) to **`partnerScope`** — the five partner Categories:
Advisory & Discovery · Solutioning · Custom Development · Hosting &
Infrastructure · Training & Adoption.
Moves the card chip, the profile facts row, the dropdown filter, the
`?categories=` URL param, and the API-boundary normalization onto
`partnerScope`. The standalone Cloud/Self-host facet is **dropped**
(hosting is now the `HOSTING` category), per the harmonization decision.
## Depends on
- The app exposing `partnerScope` — companion app PR #21126.
- The new `partnerScope` options + data migration — signup app PR
#21040.
## Tests
TDD red→green on: `filter-partners`, both API normalizers,
`filter-url-helpers`, `PartnerCard`, `use-filter-state`. 53/53 pass;
typecheck + lint + format clean.
## Merge order (we'll decide)
Independent diff. Suggested last of the four, after the signup PRs
(#21039 / #21040) and the app PR (#21126). Run `lingui:extract` once
after #21039 merges so the `.po` files don't conflict twice. Deploy the
app + migrate before the website ships.
