Increase heartbeat timeout interval in debug mode to 45s

As we do not process messages concurrently, heartbeat messages are not processed
during lengthy operations, such as contract setup.

The spam in the amount of commit messages is a bit unfortunate, but only failing
tests on various machines can indicate that the timing might cause issues.

daemon/src/lib.rs

@@ -57,7 +57,7 @@ pub mod wire;
 // Increasing the value for debug mode makes sure that we don't cause problems
 // when testing / CI, whilst the release can still detect status faster
 pub const HEARTBEAT_INTERVAL: std::time::Duration =
-    Duration::from_secs(if cfg!(debug_assertions) { 30 } else { 5 });
+    Duration::from_secs(if cfg!(debug_assertions) { 45 } else { 5 });
 
 pub const N_PAYOUTS: usize = 200;