fix: store metrics under own registry (not recon) (#266)

* fix: store metrics under own registry (not recon)

this requires updating the performance tests as they look at this metric

* chore: forgot to remove the TODO comment when resolving it

store/src/metrics.rs

@@ -59,8 +59,7 @@ pub struct Metrics {
 impl Metrics {
     /// Register and construct Metrics
     pub fn register(registry: &mut Registry) -> Self {
-        // TODO: a new sub registry that doesn't duplicate recon (need to match for now to keep tests passing)
-        let sub_registry = registry.sub_registry_with_prefix("recon");
+        let sub_registry = registry.sub_registry_with_prefix("ceramic_store");
 
         register!(
             key_insert_count,