fix(ci): the site build could not write its catalog into a fresh checkout

data/ is generated and untracked, so a fresh checkout has no such directory:
curl died on its first write with exit code 23 — "Failed writing received
data" — before it ever touched the network. Every build-site run since
88c8ce3 (#545, "stop committing a copy of it") failed, which froze
dshmarket.com at the 2026-09-08 catalog: 3,363 plugin pages live, 4,347 in
the catalog today, so 1,082 plugins had no page at all.

mkdir -p data before the fetch, drop the now-dead data/ push trigger, and
give `npm run snapshot` — the same command by hand — the same guard.

.github/workflows/build-site.yml

@@ -12,7 +12,6 @@ on:
     paths:
       - 'site/**'
       - 'scripts/build-site.mjs'
-      - 'data/registry-snapshot.json'
       - '.github/workflows/build-site.yml'
 
 # The build never writes to the repository: snapshots are fetched into the
@@ -48,6 +47,11 @@ jobs:
       # a catalog stale is not a degraded answer but a wrong one.
       - name: Fetch catalog
         run: |
+          # data/ is generated, so a fresh checkout does not contain it — git
+          # does not track empty directories. Without this, curl dies on its
+          # first write with exit code 23 before it ever reaches the network,
+          # which is how every build from 2026-09-09 until 2026-09-25 failed.
+          mkdir -p data
           curl -sfL --retry 3 --retry-delay 5 \
             https://awesome-dsh-plugin.com/plugins.json -o data/registry-snapshot.json
           # READMEs are a nice-to-have: without them pages still build, they

package.json

@@ -30,7 +30,7 @@
     "prepack": "npm run build && node scripts/preflight.mjs",
     "prepare": "npm run build",
     "validate:registry": "node scripts/validate-registry.mjs",
-    "snapshot": "curl -sf https://awesome-dsh-plugin.com/plugins.json -o data/registry-snapshot.json && curl -sf https://awesome-dsh-plugin.com/readmes.json -o data/readmes-snapshot.json",
+    "snapshot": "mkdir -p data && curl -sf https://awesome-dsh-plugin.com/plugins.json -o data/registry-snapshot.json && curl -sf https://awesome-dsh-plugin.com/readmes.json -o data/readmes-snapshot.json",
     "check:web-auth-capture": "node scripts/check-web-auth-capture.mjs",
     "test:web": "node scripts/check-web-auth-capture.mjs && vitest run --config vitest.web.config.ts",
     "build:site": "node scripts/build-site.mjs"