Add an Ambient sync provider that maps the OpenRouter-shaped catalog through the
shared builder. Skip catalog entries with is_ready=false so only served models
are generated, and set deleteMissing=false with skipped/missing notices so a
transient catalog omission retains local files instead of deleting them. Emit
reasoning_options = [] for reasoning models, since Ambient exposes no reasoning
control, rather than silently inheriting the base model's options.
Gregory
ee07b91591