`getValue` fails to infer correct type when `columnHelper.accessor` defined within `columnHelper.group`

[crcorbett]

TanStack Table version

8.20.6

Framework/Library version

React 19.0.0

Describe the bug and the steps to reproduce it

When a column is created using the columnHelper.accessor() utility within a column group columnHelper.group() the type of getValue is not correctly inferred.

CodeSandbox: https://codesandbox.io/p/devbox/funny-bush-lfv773

Example:

type Person = {
  firstName: string
  lastName: string
  age: number
  visits: number
  status: string
  progress: number
}

const defaultData: Person[] = [
  {
    firstName: 'tanner',
    lastName: 'linsley',
    age: 24,
    visits: 100,
    status: 'In Relationship',
    progress: 50,
  },
  {
    firstName: 'tandy',
    lastName: 'miller',
    age: 40,
    visits: 40,
    status: 'Single',
    progress: 80,
  },
  {
    firstName: 'joe',
    lastName: 'dirte',
    age: 45,
    visits: 20,
    status: 'Complicated',
    progress: 10,
  },
]

const columnHelper = createColumnHelper<Person>()

const columns = [
  columnHelper.accessor('firstName', {
    cell: info => info.getValue(),
    footer: info => info.column.id,
  }),
  columnHelper.group({
    id:'group',
    columns:[
      columnHelper.accessor(row => row.lastName, {
        id: 'lastName',
        // Unsafe return of a value of type `any`.
        // eslint[@typescript-eslint/no-unsafe-return](https://typescript-eslint.io/rules/no-unsafe-return)
        // CellContext<Person, any>.getValue: <any>() => any
        cell: info => <i>{info.getValue()}</i>, 
        header: () => <span>Last Name</span>,
        footer: info => info.column.id,
      }),
    ]
  })
]

Potentially related issue: #5065

Your Minimal, Reproducible Example - (Sandbox Highly Recommended)

https://codesandbox.io/p/devbox/funny-bush-lfv773

Screenshots or Videos (Optional)

No response

Do you intend to try to help solve this bug with your own PR?

No, because I do not know how

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