Issue #432: Standardize the messages for all the criteria tests

* Made little changes to improve code.
* Added Javadoc.
* Tested on MetricsHub

metricshub-engine/src/main/java/org/sentrysoftware/metricshub/engine/strategy/detection/CriterionProcessor.java

@@ -282,7 +282,8 @@ public CriterionTestResult process(@SpanAttribute("criterion.definition") Proces
 		final CriterionTestResult result = localOSVisitor.getCriterionTestResult();
 
 		if (result != null) {
-			return result.setCriterion(processCriterion);
+			result.setCriterion(processCriterion);
+			return result;
 		} else {
 			return CriterionTestResult.error(
 				processCriterion,
@@ -363,7 +364,10 @@ public CriterionTestResult processCriterionThroughExtension(
 		return maybeExtension
 			.map(extension -> {
 				CriterionTestResult result = extension.processCriterion(criterion, connectorId, telemetryManager);
-				return result != null ? result.setCriterion(criterion) : null;
+				if (result != null) {
+					result.setCriterion(criterion);
+				}
+				return result;
 			})
 			.orElseGet(CriterionTestResult::empty);
 	}

metricshub-engine/src/main/java/org/sentrysoftware/metricshub/engine/strategy/detection/CriterionTestResult.java

@@ -153,6 +153,12 @@ public static CriterionTestResult success(final Criterion criterion, final Strin
 		return CriterionTestResult.builder().success(true).message(message).result(result).criterion(criterion).build();
 	}
 
+	/**
+	 * Formats and displays the criterion message in a structured, readable format.
+	 * The output includes information about the executed criterion, its details, 
+	 * the result, and an additional message, each presented in distinct sections.
+	 * @return a formatted string that displays the criterion name, details, result, and message.
+	 */
 	public String displayCriterionMessage() {
 		return String.format(
 			"Executed %s Criterion:\n" +
@@ -172,9 +178,4 @@ public String displayCriterionMessage() {
 			message != null ? message : "N/A"
 		);
 	}
-
-	public CriterionTestResult setCriterion(final Criterion criterion) {
-		this.criterion = criterion;
-		return this;
-	}
 }