Bug: When `default_max_path_idle_timeout` is set to a lower value than connection idle timeout then WARN logs are emitted for connections to unreachable targets

[Frando]

• Iroh sets default_path_max_idle_timeout to 15s, and leaves the connection idle timeout at 30s
• When you connect to an unreachable target, noq keeps resending the initial into the void (correct
• After 15s we get a WARN log:

2026-05-15T11:27:01.511149Z  WARN connect{me=5621ed0fb1 alpn=n0/iroh/transfer/example/1 remote=f2a26551fb}:drive{id=4}:timer_fired{scope="path" path_id=0 timer=PathIdle}: noq_proto::connection: failed closing path err=MultipathNotNegotiated