Clients propagate pre-existing tokens to local sessions

[fuzzypixelz]

Describe the bug

Because clients propagate interest in Future mode, they cannot reliably decide if a token is fresh or not.

To reproduce

#!/usr/bin/env nuze -X0

# stdout:
# a: declare token on x
# c2: declare token on x
# c1: new token PUT on x

zenoh open -s a {mode:router,id:a,listen:{endpoints:[tcp/::1:9000]}}
sleep 100ms

zenoh runtime open c {mode:client,id:c,connect:{endpoints:[tcp/::1:9000]}}
zenoh open -s c1 --runtime c
zenoh open -s c2 --runtime c
sleep 100ms

print "a: declare token on x"
let x = zenoh liveliness declare-token -s a x
sleep 100ms

job spawn {zenoh liveliness sub -s c1 x | each {|s| print $"c1: new token ($s.kind) on x"}}
sleep 100ms

print "c2: declare token on x"
let x2 = zenoh liveliness declare-token -s c2 x
sleep 100ms

System info

• rev: 1a61bf7