Add logging and ignore simulation output

Author: rklaehn

.gitignore

@@ -1 +1,2 @@
 /target
+*.gif

Cargo.lock

@@ -29,3 +29,4 @@ iroh = { git = "https://github.com/n0-computer/iroh", branch = "connection-speed
 [dev-dependencies]
 gif = "0.13.3"
 testresult = "0.4.1"
+tracing-subscriber = "0.3.19"

Cargo.toml

@@ -406,8 +406,6 @@ async fn perfect_routing_tables_10k() {
 #[tokio::test(flavor = "multi_thread")]
 #[ignore = "runs very long and takes ~20GiB"]
 async fn perfect_routing_tables_100k() {
-    let metrics = tokio::runtime::Handle::current().metrics();
-    println!("{metrics:?}");
     let n = 100000;
     let seed = 0;
     let bootstrap = next_n(0);
@@ -547,6 +545,7 @@ fn spawn_routers(iroh_nodes: &IrohNodes) -> Vec<Router> {
 
 #[tokio::test(flavor = "multi_thread")]
 async fn iroh_perfect_routing_tables_500() -> TestResult<()> {
+    tracing_subscriber::fmt::try_init().ok();
     let n = 500;
     let seed = 0;
     let bootstrap = 0;