site: rename "finds" superpost collection to "bundles"

Disambiguates the one-letter `find` (item) vs `finds` (roundup) split that
kept causing confusion. Audience-facing now: `/bundles/<slug>/`, "Bundle"
labels in home/footer/search.

Internals: `getCollection('finds')` → `('bundles')`, `Entry.type 'finds'`
→ `'bundle'`, `OgFallback 'finds'` → `'bundles'`, `findListMosaic` →
`bundleMosaic`, `FindsPost` → `Bundle`, `findsReferencing` →
`bundlesReferencing`. Build script + generated mosaic dir follow
(`scripts/build-bundle-mosaics.mjs`, `src/generated/bundle-mosaics/`).

Skills `build-finds` → `build-bundle`, `cluster-finds` →
`cluster-bundles`. The `find` collection (individual items) is unchanged.

No URL redirects: low external-link surface area.

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## May 2026
 
+- Rename the "finds" superpost concept to **bundle**. The `finds` collection becomes `bundles` (`src/content/bundles/`), URLs move from `/finds/<slug>/` to `/bundles/<slug>/`, and the home/footer/search labels switch from "List" to "Bundle". Internal renames: `findListMosaic` → `bundleMosaic`, `FindsPost` → `Bundle`, `findsReferencing` → `bundlesReferencing`, `Entry.type 'finds'` → `'bundle'`, `OgFallback 'finds'` → `'bundles'`. Build script and generated mosaic dir follow (`scripts/build-bundle-mosaics.mjs`, `src/generated/bundle-mosaics/`). Skills `build-finds` and `cluster-finds` renamed to `build-bundle` and `cluster-bundles`. The `find` collection (individual items) is unchanged
 - Add Cloudflare Web Analytics: privacy-preserving, cookieless beacon injected into `BaseLayout.astro` so per-page traffic, referrers, and Core Web Vitals show up in the Cloudflare dashboard scoped to `unique.rzen.dev`. Privacy statement on `/legal/` updated to disclose the beacon
 - Strengthen the "Use of the site" section on `/legal/`: explicit "inclusion isn't endorsement" + no warranty on safety/quality/durability/fit/continued-existence + no responsibility for what happens after click-through. Tone kept plain, not legalese
 - Colocate every collection's articles with their media: each entry is now a folder `<slug>/index.mdx` with sibling media files. Applied to `reviews/`, `find/` (104 articles + 89 heroes auto-resolved by `src/lib/find-hero.ts` via `import.meta.glob('../content/find/*/hero.{...}')`), `finds/`, and `posts/`. Slug derivation handled by a shared `stripIndex` helper on each glob loader; URLs unchanged across the entire site. MDX paths shortened from `../../assets/reviews/<slug>/<file>` to `./<file>`. `src/assets/` removed entirely