fixed from code review

Signed-off-by: Attila Mészáros <a_meszaros@apple.com>

Author: csviri

docs/content/en/docs/documentation/observability.md

@@ -127,8 +127,8 @@ All meters use `controller.name` as their primary tag. Counters optionally carry
 
 \* `namespace` tag is only included when `withNamespaceAsTag()` is enabled.
 
-The execution timer uses explicit SLO boundaries (10ms, 50ms, 100ms, 250ms, 500ms, 1s, 2s, 5s, 10s, 30s) to ensure
-compatibility with `histogram_quantile()` queries in Prometheus. This is important when using the OTLP registry, where
+The execution timer uses explicit boundaries (10ms, 50ms, 100ms, 250ms, 500ms, 1s, 2s, 5s, 10s, 30s) to ensure
+compatibility with `histogram_quantile()` queries in Prometheus. This is important when using the OpenTelemetry Protocol (OTLP) registry, where
 `publishPercentileHistogram()` would otherwise produce Base2 Exponential Histograms that are incompatible with classic
 `_bucket` queries.
 

micrometer-support/src/main/java/io/javaoperatorsdk/operator/monitoring/micrometer/MicrometerMetricsV2.java

@@ -22,8 +22,6 @@
 import java.util.function.Consumer;
 import java.util.function.Function;
 
-import org.jspecify.annotations.NonNull;
-
 import io.fabric8.kubernetes.api.model.HasMetadata;
 import io.javaoperatorsdk.operator.OperatorException;
 import io.javaoperatorsdk.operator.api.monitoring.Metrics;
@@ -179,11 +177,7 @@ public void eventReceived(Event event, Map<String, Object> metadata) {
           Tag.of(ACTION, resourceEvent.getAction().toString()));
     } else {
       incrementCounter(
-          EVENTS_RECEIVED,
-          null,
-          metadata,
-          Tag.of(EVENT, event.getClass().getSimpleName()),
-          Tag.of(ACTION, UNKNOWN_ACTION));
+          EVENTS_RECEIVED, null, metadata, Tag.of(EVENT, event.getClass().getSimpleName()));
     }
   }
 
@@ -267,11 +261,11 @@ private void incrementCounter(
     registry.counter(counterName, tags).increment();
   }
 
-  private static @NonNull String reconciliationExecutionGaugeRefKey(String controllerName) {
+  private static String reconciliationExecutionGaugeRefKey(String controllerName) {
     return RECONCILIATIONS_EXECUTIONS_GAUGE + "." + controllerName;
   }
 
-  private static @NonNull String controllerQueueSizeGaugeRefKey(String controllerName) {
+  private static String controllerQueueSizeGaugeRefKey(String controllerName) {
     return RECONCILIATIONS_QUEUE_SIZE_GAUGE + "." + controllerName;
   }