chore: upgrade vitest and @vitest/ui to 4.1.2 (#16154)

## Summary

- Bump `vitest` from 4.0.15 to 4.1.2 (root + test/)
- Bump `@vitest/ui` from 4.0.15 to 4.1.2 (root)
- Fix `graphql` module alias in `vitest.config.ts` for compatibility
with Vitest 4.1's new module runner

### graphql alias fix

Vitest 4.1 replaced the default SSR environment runner with a new Vite
module runner that loads "inlined" modules in its own context and
"external" modules via Node's native import. This caused the `graphql`
package to be loaded twice (two separate module instances), breaking all
`instanceof` checks (e.g. `isScalarType`, `new GraphQLList`).

The previous alias (`graphql: 'node_modules/graphql/index.js'`) also no
longer worked because pnpm's isolated linker doesn't hoist `graphql` to
root `node_modules/`.

Fix: use `createRequire` to resolve the actual `graphql` location from
`packages/graphql/` (where it's a direct dependency), then use
regex-based aliases to handle both the main import and subpath imports
(e.g. `graphql/execution/values.js`), pointing the main import to the
CJS entry (`index.js`) to ensure a single module identity.

This unlocks native test tags support (`--tags-filter` CLI) which will
be used in a follow-up PR to tag tests by feature category (GIS,
transactions, migrations, etc.).

## Test plan

- [ ] CI passes (all existing integration tests should continue to work
unchanged)
- Verified locally: `auth`, `collections-graphql`, `collections-rest`,
`fields`, `database` suites all pass

---------

Co-authored-by: German Jablonski <GermanJablo@users.noreply.github.com>

Author: GermanJablo

package.json

@@ -197,7 +197,7 @@
     "@types/react": "19.2.9",
     "@types/react-dom": "19.2.3",
     "@types/shelljs": "0.8.15",
-    "@vitest/ui": "4.0.15",
+    "@vitest/ui": "4.1.2",
     "ai": "6.0.95",
     "axe-core": "4.11.0",
     "chalk": "^4.1.2",
@@ -240,7 +240,7 @@
     "tsx": "4.21.0",
     "turbo": "^2.5.4",
     "typescript": "5.7.3",
-    "vitest": "4.0.15",
+    "vitest": "4.1.2",
     "wrangler": "~4.61.1",
     "zod": "4.3.6"
   },