update measured with some more convenient features (#7334)

## Problem

Some awkwardness in the measured API.
Missing process metrics.

## Summary of changes

Update measured to use the new convenience setup features.
Added measured-process lib.
Added measured support for libmetrics

storage_controller/src/persistence.rs

@@ -79,7 +79,7 @@ pub(crate) enum DatabaseError {
     Logical(String),
 }
 
-#[derive(measured::FixedCardinalityLabel, Clone)]
+#[derive(measured::FixedCardinalityLabel, Copy, Clone)]
 pub(crate) enum DatabaseOperation {
     InsertNode,
     UpdateNode,
@@ -153,9 +153,7 @@ impl Persistence {
         let latency = &METRICS_REGISTRY
             .metrics_group
             .storage_controller_database_query_latency;
-        let _timer = latency.start_timer(DatabaseQueryLatencyLabelGroup {
-            operation: op.clone(),
-        });
+        let _timer = latency.start_timer(DatabaseQueryLatencyLabelGroup { operation: op });
 
         let res = self.with_conn(func).await;