fix(event proto): reject malformed internal protobuf instead of panicking

changelog.d/fallible_event_proto_decode.fix.md

@@ -0,0 +1,3 @@
+Decoding Vector's native protobuf format (`decoding.codec = "native"`) and disk-buffer records no longer panics when an event variant is missing or unrecognized, when a float field is `NaN`, or when an AgentDDSketch has mismatched bin lists. Those payloads are rejected, dropped, and reported through existing decode/buffer error telemetry. A `NaN` float in event data or metadata rejects the entire record rather than rewriting the value.
+
+authors: bruceg

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

@@ -52,7 +52,7 @@ impl Deserializer for NativeDeserializer {
         if bytes.is_empty() {
             Ok(smallvec![])
         } else {
-            let event_array = EventArray::from(proto::EventArray::decode(bytes)?);
+            let event_array = EventArray::try_from(proto::EventArray::decode(bytes)?)?;
             Ok(event_array.into_events().collect())
         }
     }