chore: add TODO comments linking to log_namespace design issues

#25044
#25045

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

Author: pront

lib/codecs/src/decoding/format/mod.rs

@@ -50,6 +50,8 @@ pub trait Deserializer: DynClone + Send + Sync {
     /// by not requiring heap allocations for it.
     ///
     /// **Note**: The type of the produced events depends on the implementation.
+    ///
+    /// TODO: <https://github.com/vectordotdev/vector/issues/25044>
     fn parse(
         &self,
         bytes: Bytes,

lib/codecs/src/decoding/format/otlp.rs

@@ -181,6 +181,7 @@ impl Deserializer for OtlpDeserializer {
                     }
                 }
                 OtlpSignalType::Traces => {
+                    // TODO: https://github.com/vectordotdev/vector/issues/25045
                     if let Ok(mut events) =
                         self.traces_deserializer.parse(bytes.clone(), log_namespace)
                         && let Some(Event::Log(log)) = events.first()