_profile_db acquired a registry WRITER on another profile's state.db for
every RPC about it and closed it in the handler's finally — schema init
plus the write lock on a store owned by that profile's own gateway, once
per sidebar refresh under desktop app-global remote mode. Reads now go
through the dashboard sidebar's read-only open helper; the four handlers
that mutate (session.move_cwd, session.delete, session.set_hidden,
session.foreign.import) opt in with writer=True.
Field trace and read-only approach by @samalone on #109737.
Co-authored-by: samalone <samalone@users.noreply.github.com>
yoniebans
31e0300b52