move FoundIn to observability.rs

src/utils.rs

@@ -245,35 +245,6 @@ pub(crate) fn truncate_str_for_debug(
     }
 }
 
-/// Type to record cache performance in a tracing span field.
-pub(crate) enum FoundIn {
-    /// Found in cache
-    Cache,
-    /// Cache miss, but it was in the database. The cache has been updated.
-    Database,
-    /// Cache and database miss, but another server had it. The cache has been
-    /// updated.
-    Remote,
-    /// The entry could not be found anywhere.
-    Nothing,
-}
-
-impl FoundIn {
-    fn value(&self) -> &'static str {
-        match self {
-            FoundIn::Cache => "hit",
-            FoundIn::Database => "miss-database",
-            FoundIn::Remote => "miss-remote",
-            FoundIn::Nothing => "not-found",
-        }
-    }
-
-    // TODO: use tracing::Value instead if it ever becomes accessible
-    pub(crate) fn record(&self, field: &str) {
-        tracing::Span::current().record(field, self.value());
-    }
-}
-
 #[cfg(test)]
 mod tests {
     use crate::utils::truncate_str_for_debug;