chore: add DEBUG reveal of the CloudKit owner record IDchore/owner-record-id-reveal

Groundwork for the owner Pro+ allowlist. Adds OwnerAccess, which identifies the
app owner by their CloudKit user-record ID (a stable, opaque per-Apple-ID value
that cannot be guessed or spoofed), plus a DEBUG-only "Developer" row in
Settings → App Info that fetches and copies the current iCloud user's record ID
for the app's container.

OwnerAccess.ownerUserRecordID is empty, so isOwner() is inert until the real
value is filled in. A follow-up will hardcode the owner ID, wire isOwner() into
PurchaseService to grant .proPlus on a match, remove this reveal, and cut 5.0.1.

DEBUG-only UI; release builds are unaffected.

0 files changed, 0 insertions, 0 deletions