Function dispatch_inference 

pub fn dispatch_inference(
    agents: Query<'_, '_, (Entity, &AgentState, &ContextWindow, Option<&InferenceConfig>, &StageInference, Option<&InFlightWork>, Option<&StageProgress>), With<ReadyToInfer>>,
    stage: Res<'_, InferenceStage>,
    providers: Res<'_, Providers>,
    par_commands: ParallelCommands<'_, '_>,
)

Inference-dispatch system: for every ReadyToInfer agent, resolve its provider and, if a per-model permit is free, build the request, spawn the inference job, and move it to AwaitingInference. If its provider is missing or no slot is free, it stays ReadyToInfer and is retried on a later tick - no blocking, no wasted task.