Warn when ConnectionManagerData merges participants from a second
connection to the same SFU URL, when more than one LiveKit participant
matches a member's backend identity, and when a scope is ended while one
of its behaviors is still delivering a value (which strands the later
bound subscribers on the old value). The per-member match log now also
names the connection the participant came from.
A single re-entrant emission can only strand a contiguous run of a
behavior's subscribers, so a tile that is both 'speaking' and 'waiting
for media' (a middle subscriber stranded) implies a nested re-entry.
Report the nesting depth and log each new depth once instead of only the
first re-entry, and tag splitBehavior-derived behaviors with their field
name so the warning identifies which behavior tore.
rxjs delivers a nested emission to every subscriber and then resumes
delivering the outer, older value to the remaining subscribers, which
leaves them permanently out of sync. Log the first occurrence per
behavior with a stack trace so the re-entrant path can be identified
from a rageshake.
Robin