refactor(logging): enhance logging setup and usage

- Modified the `setup_logging` function to return a `Subscriber`, improving flexibility and reuse.
- Integrated `tracing::subscriber::set_global_default` in the main functions to establish the logging subscriber globally.
- Added configurations for span events and control over file and line information display.

Signed-off-by: Harald Hoyer <harald@matterlabs.dev>

bin/vault-admin/src/main.rs

@@ -110,7 +110,10 @@ struct Arguments {
 async fn main() -> Result<()> {
     let args = Arguments::parse();
 
-    setup_logging(&args.log_level)?;
+    tracing::subscriber::set_global_default(setup_logging(
+        env!("CARGO_CRATE_NAME"),
+        &args.log_level,
+    )?)?;
 
     info!("Quote verified! Connection secure!");