observability: tracing gum, automatically cross ref traceID (#5079)

* add some gum

* bump expander

* gum

* fix all remaining issues

* last fixup

* Update node/gum/proc-macro/src/lib.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* change

* netowrk

* fixins

* chore

* allow optional fmt str + args, prep for expr as kv field

* tracing -> gum rename fallout

* restrict further

* allow multiple levels of field accesses

* another round of docs and a slip of the pen

* update ADR

* fixup lock fiel

* use target: instead of target=

* minors

* fix

* chore

* Update node/gum/README.md

Co-authored-by: Andrei Sandu <54316454+sandreim@users.noreply.github.com>

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>
Co-authored-by: Andrei Sandu <54316454+sandreim@users.noreply.github.com>

polkadot/node/subsystem-util/Cargo.toml

@@ -15,7 +15,7 @@ pin-project = "1.0.9"
 rand = "0.8.5"
 thiserror = "1.0.30"
 fatality = "0.0.6"
-tracing = "0.1.32"
+gum = { package = "tracing-gum", path = "../gum" }
 derive_more = "0.99.17"
 lru = "0.7.3"
 

polkadot/node/subsystem-util/src/lib.rs

@@ -586,7 +586,7 @@ where
 			)
 			.await
 			{
-				tracing::error!(
+				gum::error!(
 					job = Job::NAME,
 					parent_hash = %hash,
 					err = ?e,
@@ -732,7 +732,7 @@ impl<Job: JobTrait, Spawner> JobSubsystem<Job, Spawner> {
 							}
 						}
 						Err(err) => {
-							tracing::error!(
+							gum::error!(
 								job = Job::NAME,
 								err = ?err,
 								"error receiving message from subsystem context for job",
@@ -751,7 +751,7 @@ impl<Job: JobTrait, Spawner> JobSubsystem<Job, Spawner> {
 					};
 
 					if let Err(e) = res {
-						tracing::warn!(err = ?e, "failed to handle command from job");
+						gum::warn!(err = ?e, "failed to handle command from job");
 					}
 				}
 				complete => break,