Sessions in a lab are now collaborative artifacts. Any owner can
host (own the local Frida attachment) and any owner can drive
(issue REPL evals and instrument commands); a driver's actions
are relayed to the current host. Members watch read-only and see
an "Only lab owners can host sessions" CTA when they try the new
session button.
Re-host (Run on My Device…) lets an owner take over a running
session by attaching to their own equivalent process; the prior
host's Frida attachment detaches and the new host auto-loads the
session's instruments. Driver auto-reverts to host when the
current driver fully disconnects from the lab.
Extract supporting types that ProcessNode produces into
LumaCore so both frontends can work with script errors,
console output, and symbolication results.
Also extract parseAgentHexAddress and LumaCoreError as
shared utilities.