chore(ci): re-pin reusable ci.yml to the pnpm-store cache build

Bump the SocketDev/socket-registry reusable ci.yml pin to 4069dfc8, the
restored reusable workflow whose setup-and-install caches the pnpm
store. CI install is now warm on every job + matrix cell.

Author: jdalton

.github/workflows/ci.yml

@@ -29,4 +29,4 @@ concurrency:
 jobs:
   ci:
     name: Run CI Pipeline
-    uses: SocketDev/socket-registry/.github/workflows/ci.yml@1710ff0c384b95e23651b84da9f90f90e7c32e52 # main (2026-06-03)
+    uses: SocketDev/socket-registry/.github/workflows/ci.yml@4069dfc8c54c0b6ffa43924857e6b89296370efe # main (2026-06-09)