Give each AgentOS entity its own UI metadata

Persist cancelled runs across agents, teams, and workflows

Agents, teams, and workflows now persist cancelled runs properly, so a run that gets cancelled is recorded in the database instead of vanishing.

Pick up output files from the RunCompleted event

The RunCompleted event now carries a files field, so anything listening for run completion can grab the files a run produced directly off the event instead of fetching them separately.

Reference Gemini Interactions by model string

The model string parser now recognizes the google-interactions provider, so you can select GeminiInteractions through a model string rather than importing and constructing the class yourself.