feat(metrics): initial impl

Author: anunaym14

Cargo.lock

@@ -35,6 +35,7 @@ prost = "0.12"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1.0"
 tokio = { version = "1", default-features = false, features = ["sync", "macros", "fs"] }
+tokio-util = "0.7.15"
 parking_lot = { version = "0.12" }
 futures-util = { version = "0.3", default-features = false, features = ["sink"] }
 thiserror = "1.0"