Preserve profile ownership proven at the secondary socket boundary rather
than trusting arbitrary wire profile fields. Retire transient local owners
with the profile pool, while keeping durable and exact remote ownership first.
Salvage #103774 with two invariant tests and routing documentation. The
profile-only fallback was also identified in the earlier #103770; this
version retains the producer provenance and retirement boundary.
Live Desktop renderer with two isolated serve backends: Reject previously
failed after clearing durable bindings, leaving approval pending. With this
change, the same action sends deny to the owning backend and pending clears.
Existing-binding controls pass on both sides. No vendor inference used.
Fixes#103755
Salvaged-from: 8a3c545e255b66b6ca4bc4b99cd725c5f7a08632
Robert Borkowski
9d9bfd6a75