fix(build): approve esbuild/msw/sharp build scripts for pnpm v10

The previous fix got past the lockfile mismatch. The next failure
mode (in CI specifically) was ERR_PNPM_IGNORED_BUILDS — pnpm v10
sandboxes package install scripts by default, and Railway runs
non-interactively so the "ignored" warning becomes a hard error.

Add the three packages that genuinely need their postinstall hooks
to the onlyBuiltDependencies allowlist in pnpm-workspace.yaml:

- esbuild: native binary download + chmod.
- msw:    install-time worker stub generation.
- sharp:  libvips native binary download.

Verified locally with pnpm v10.32: install --frozen-lockfile finishes
clean, no ignored-scripts warning.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: ralyodio

pnpm-workspace.yaml

@@ -14,3 +14,12 @@ overrides:
   cookie: "1.1.1"
   diff: "8.0.4"
   serialize-javascript: "7.0.5"
+
+# pnpm v10 sandboxes install scripts by default. Anything not listed
+# here gets its postinstall skipped — and in CI (or any non-interactive
+# context) that becomes ERR_PNPM_IGNORED_BUILDS instead of a warning.
+# These three packages need their native-build / setup hooks to run.
+onlyBuiltDependencies:
+  - esbuild
+  - msw
+  - sharp