The caller-bound operation set now says what it is: the jobs one caller
may operate on. The caller argument is required (SessionId | undefined),
so an anonymous view has to be requested explicitly instead of falling
out of a forgotten argument.
- job.rows({ sessionId }) streams the jobs one session can see as whole-set
frames: once on open, then after each coalesced burst of lifecycle
commits; output appends never refresh it
- job.observe reads through visibleTo(sessionId) and carries JobView in its
opened and status frames; the wire chunk is the registry's JobChunk
- the client installs ctx.jobs (ClientJobs over ClientJobsModel): watchRows
and observe are reference-counted streams, rows drop with the last
watcher or a terminal failure, observations keep their render tail
- the controller no longer needs the agent registry