Emit a span for get_zarr_manifest()

Cargo.toml

@@ -50,6 +50,7 @@ tower-http = { version = "0.5.2", features = ["set-header", "trace"] }
 tracing = "0.1.40"
 tracing-subscriber = { version = "0.3.18", features = ["json", "local-time", "time"] }
 url = { version = "2.5.2", features = ["serde"] }
+uuid = { version = "1.10.0", features = ["fast-rng", "v4"] }
 xml-rs = "0.8.20"
 
 [dev-dependencies]

src/main.rs

@@ -28,7 +28,6 @@ use axum::{
 };
 use clap::Parser;
 use std::fmt;
-use std::io::stderr;
 use std::net::IpAddr;
 use std::sync::Arc;
 use tower::service_fn;
@@ -78,7 +77,7 @@ fn main() -> anyhow::Result<()> {
             tracing_subscriber::fmt::layer()
                 .json()
                 .with_timer(timer)
-                .with_writer(stderr),
+                .with_writer(std::io::stderr),
         )
         .with(
             Targets::new()

src/zarrman/mod.rs

@@ -275,6 +275,7 @@ impl ZarrManClient {
 
     /// Retrieve the Zarr manifest at the given [`ManifestPath`] in the
     /// manifest tree, either via an HTTP request or from a cache
+    #[tracing::instrument(skip_all, fields(id = %uuid::Uuid::new_v4(), manifest = %path))]
     async fn get_zarr_manifest(
         &self,
         path: &ManifestPath,