List the store's members

Only on a members-only store (`422 validation_error` otherwise). - **Simple stores:** JSON `{ name?, applicationNote? }`. The store's auto-approve setting applies, so the result may be `active` at once. Email and phone come from the shopper credential. - **ID-verified stores** (`store.membership.requireVerification`): `multipart/form-data` with the hosted storefront's fields and two files. A JSON body gets `422 verification_required`. A verified application is **always** `pending`. Re-applying while `pending` or `active` returns `200` with the current status and leaves the documents under review alone; a `rejected` or `revoked` shopper may re-apply with new documents. The whole request must fit the hosting body limit (about 4.5MB), so resize photos in the browser first (selfie about 1200px, ID about 1600px, JPEG). Old path, deprecated, sunset 1 Feb 2027: `POST /v1/members/apply`.