Classify a watched ref against the dataset a store is mounted on. Only a
dataset:-scheme ref addressing exactly that project + dataset is
observable through the mounted store; everything else — another dataset,
another project, or a canvas: / media-library: / dashboard: resource —
must be observed through a store that can address it, or rejected loudly.
Never silently read a foreign ref from the mounted store: a same-_id doc
there would be fed as if it were the foreign doc.
Classify a watched ref against the dataset a store is mounted on. Only a
dataset:-scheme ref addressing exactly that project + dataset is observable through the mounted store; everything else — another dataset, another project, or acanvas:/media-library:/dashboard:resource — must be observed through a store that can address it, or rejected loudly. Never silently read a foreign ref from the mounted store: a same-_iddoc there would be fed as if it were the foreign doc.