The uc reference in the random pet batch (lines 970/973) is a regression
from GRO-1949 — uc is only defined in the UAT client loop context (line 1056),
not in the surrounding random pet generation loop. Deterministic UAT pet
alerts are already correctly implemented in the uatClients loop (lines
1073-1078) where uc is in scope.
This removes the undefined uc references from the random batch IIFE,
restoring typecheck compliance. The deterministic UAT seeding for
TestCooper/TestRocky remains intact in the uAT client loop.