perf(ci): share trusted caches and fail fast on PR test failures (#3007)

* fix(ci): restore inherited validation failures

* perf(ci): share trusted caches and fail fast on PR test failures

* fix(ci): bound static cache and hash vitest config for knip

- Bound the rolling .turbo/cache snapshot with 7d/500MB eviction so each
  trusted main save cannot accumulate history toward the GitHub limit.
- Hash vitest.config.ts in knip inputs so removing the CiTestSequencer
  import invalidates the cached passing check.
- Cover both in cache-policy and task-hash regressions.

.github/workflows/sqlite-runtime.yml

@@ -27,7 +27,9 @@ jobs:
         with:
           node-version: ${{ matrix.node }}
           check-latest: true
-          cache: npm
+      - name: Cache npm package downloads
+        id: npm-cache
+        uses: ./.github/actions/npm-cache
       - run: npm ci
       - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with: