perf(build): replace adapter precompress with a parallel, filtered step

adapter-node's `precompress: true` brotli-q11 + gzips every file in
build/client single-threaded — ~150 MB including 91 MB of already-
compressed media (zero gain) and tens of MB of server-only data — adding
minutes to the build. The worst offenders were ML embedding JSONs
(nutrition 35 MB + bls 20 MB + shopping ~4 MB) that are `?url`-imported by
$lib/server/{nutritionMatcher,shoppingCategorizer}.ts and read server-side
via SvelteKit's read(); no browser ever fetches them, so compressing them
is pure waste.

- svelte.config.js: precompress: false.
- scripts/precompress.ts: postbuild step that only compresses text asset
  types, skips binaries and server-only data (bible TSVs by name, embedding
  JSONs by hashed-name pattern), tunes brotli quality down for large files,
  runs gzip+brotli in parallel, and never writes a larger-than-original or
  duplicate sibling.
- package.json: run precompress after build-error-page with
  UV_THREADPOOL_SIZE=12 so the async compression actually parallelizes.
- Delete static/allioli.json: 20 MB, unreferenced anywhere in the repo.

package.json

@@ -8,7 +8,7 @@
 		"dev": "vite dev",
 		"prebuild": "bash scripts/subset-emoji-font.sh && pnpm exec vite-node scripts/generate-mystery-verses.ts && pnpm exec vite-node scripts/download-models.ts && pnpm exec vite-node scripts/generate-loyalty-cards.ts && pnpm exec vite-node scripts/generate-error-quotes.ts && pnpm exec vite-node scripts/build-hikes.ts && pnpm exec vite-node scripts/build-private-images.ts",
 		"build": "vite build",
-		"postbuild": "pnpm exec vite-node scripts/build-error-page.ts && pnpm exec vite-node scripts/precompress.ts",
+		"postbuild": "pnpm exec vite-node scripts/build-error-page.ts && UV_THREADPOOL_SIZE=12 pnpm exec vite-node scripts/precompress.ts",
 		"preview": "vite preview",
 		"check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
 		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch",