feat(models): Allow reliable models and update model selection logic in UI

feat(lab): add roster model defaults merging to preserve user selections for newly added agents

feat: make every scenario arena-grade with a competition contract

feat(fishbowl): seed is a preset dropdown that fills an editable beat textbox

feat(fishbowl): scenario-adaptive Lab with per-agent & per-scenario config editing

feat: add Hugging Face inference backend next to Modal

feat: Enhance model routing and deployment flexibility

feat: add Fishbowl Lab composer component tree + world-config helper