feat: cleaner logging

- less clutter with unusable `span` info (on my personal preference)
- less errors logged when being scanned (ex.: after status response
    don't log errors with ping packets, scanners usually close
    the connection)
- implemented more detailed OpaqueError fields
    - `tracing::Level`
    - error `kind`

src/kube_cache.rs

@@ -99,17 +99,19 @@ impl MinecraftAPI<Server> for McApi {
         let dep_name = match self.cache.query_dep_addr(&addr, &port).await {
             Some(x) => x,
             None => {
-                return Err(OpaqueError::create(&format!(
-                    "Failed to find deployment name by addr"
-                )))
+                return Err(OpaqueError::create_with_kind(
+                    "Failed to find deployment name by addr",
+                    "DepNameLookupFailed",
+                ))
             }
         };
         let srv_name = match self.cache.query_srv_addr(&addr, &port).await {
             Some(x) => x,
             None => {
-                return Err(OpaqueError::create(&format!(
-                    "Failed to find service name by addr"
-                )))
+                return Err(OpaqueError::create_with_kind(
+                    "Failed to find service name by addr",
+                    "SrvNameLookupFailed",
+                ))
             }
         };