Pedro (User B) can see and edit Ana's (User A) clients
Any agent can see another agent's entire portfolio and change their sales stages.
Expected
Pedro only sees and edits his own clients; the API rejects the change.
Observed
Pedro's list includes Ana's clients and the API accepts the change (204).
PATCH /rest/v1/clients?id=eq.c_01… · Pedro
204 No Content · stage: "negotiation" → "closed"