[paced mutations]: Fix how we init AsyncQueuer

[KyleAMathews]

The AsyncQueuer constructor signature requires:

1. A function that processes each queued item as the first parameter
2. An options object as the second parameter

The previous code incorrectly passed only the options object, causing TypeScript errors:

• 'concurrency' does not exist in type '(item void) => Promise'
• Argument of type '() => Promise' is not assignable to parameter type 'void'

Fixed by:

• Changing AsyncQueuer type parameter from void to () => Promise
• Passing an async function as the first parameter that executes queued tasks
• Moving options to the second parameter

This resolves the type check errors that were appearing in test runs.

🎯 Changes

✅ Checklist

• I have followed the steps in the Contributing guide.
• I have tested this code locally with pnpm test:pr.

🚀 Release Impact

• This change affects published code, and I have generated a changeset.
• This change is docs/CI/dev-only (no release).

[changeset-bot]

🦋 Changeset detected

Latest commit: 0fc4748

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 13 packages

Name	Type
@tanstack/db	Patch
@tanstack/angular-db	Patch
@tanstack/electric-db-collection	Patch
@tanstack/query-db-collection	Patch
@tanstack/react-db	Patch
@tanstack/rxdb-db-collection	Patch
@tanstack/solid-db	Patch
@tanstack/svelte-db	Patch
@tanstack/trailbase-db-collection	Patch
@tanstack/vue-db	Patch
todos	Patch
@tanstack/db-example-paced-mutations-demo	Patch
@tanstack/db-example-react-todo	Patch

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