chore(trace): Add trace attributes (#127)

Adds the package name and reference, if available, to the trace
attributes.

This allows identifying what package/version caused a slow response.

src/pyoci.rs

@@ -469,7 +469,7 @@ impl PyOci {
     /// Push a blob to the registry using POST then PUT method
     ///
     /// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#post-then-put
-    #[tracing::instrument(skip_all)]
+    #[tracing::instrument(skip_all, fields(otel.name = name))]
     async fn push_blob(
         &mut self,
         // Name of the package, including namespace. e.g. "library/alpine"
@@ -548,7 +548,7 @@ impl PyOci {
     /// Pull a blob from the registry
     ///
     /// This returns the raw response so the caller can handle the blob as needed
-    #[tracing::instrument(skip_all)]
+    #[tracing::instrument(skip_all, fields(otel.name = name))]
     async fn pull_blob(
         &mut self,
         // Name of the package, including namespace. e.g. "library/alpine"
@@ -568,7 +568,7 @@ impl PyOci {
     }
 
     /// List the available tags for a package
-    #[tracing::instrument(skip_all)]
+    #[tracing::instrument(skip_all, fields(otel.name = name))]
     async fn list_tags(&mut self, name: &str) -> anyhow::Result<TagList> {
         let url = build_url!(&self, "/v2/{}/tags/list", name);
         let request = self.transport.get(url);
@@ -585,7 +585,7 @@ impl PyOci {
     ///
     /// ImageIndex will be pushed with a version tag if version is set
     /// ImageManifest will always be pushed with a digest reference
-    #[tracing::instrument(skip_all)]
+    #[tracing::instrument(skip_all, fields(otel.name = name, otel.version = version))]
     async fn push_manifest(
         &mut self,
         name: &str,
@@ -624,7 +624,7 @@ impl PyOci {
     ///
     /// If the manifest does not exist, Ok<None> is returned
     /// If any other error happens, an Err is returned
-    #[tracing::instrument(skip_all)]
+    #[tracing::instrument(skip_all, fields(otel.name = name, otel.reference = reference))]
     async fn pull_manifest(&mut self, name: &str, reference: &str) -> Result<Option<Manifest>> {
         let url = build_url!(&self, "/v2/{}/manifests/{}", name, reference);
         let request = self.transport.get(url).header(
@@ -664,7 +664,7 @@ impl PyOci {
     ///
     /// reference: tag or digest of the manifest to delete
     /// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#content-management
-    #[tracing::instrument(skip_all)]
+    #[tracing::instrument(skip_all, fields(otel.name = name, otel.reference = reference))]
     async fn delete_manifest(&mut self, name: &str, reference: &str) -> Result<()> {
         let url = build_url!(&self, "/v2/{}/manifests/{}", name, reference);
         let request = self.transport.delete(url);