OLD: checked only if CURRENT agent was on a GPU
Tanko→MoE, Mumuni also→MoE (didnt see Tanko)
NEW: checks if ANY agent is on a GPU (cross-agent awareness)
Pass 1: prefer GPUs with 0 agents
Pass 2: prefer GPU this agent is not already on
Pass 3: any non-busy GPU
Prevents Tanko+Mumuni piling onto same GPU simultaneously
even when both slots are free. Combined with MoE=1 slot,
guarantees overflow goes to idle Dense.
Abiba
34fb7516e1