Add @regexp annotation to some regular expression strings

Author: Mats-SX

ml/ml-algo/src/main/java/org/neo4j/gds/ml/metrics/classification/ClassificationMetricSpecification.java

@@ -19,6 +19,7 @@
  */
 package org.neo4j.gds.ml.metrics.classification;
 
+import org.intellij.lang.annotations.RegExp;
 import org.neo4j.gds.core.utils.mem.MemoryEstimation;
 import org.neo4j.gds.core.utils.mem.MemoryEstimations;
 import org.neo4j.gds.core.utils.mem.MemoryRange;
@@ -48,6 +49,7 @@ public interface ClassificationMetricSpecification {
         Recall.NAME, Recall::new,
         Accuracy.NAME, Accuracy::new
     ));
+    @RegExp
     String NUMBER_OR_STAR = "((?:-?[\\d]+)|(?:\\*))";
     String VALID_SINGLE_CLASS_METRICS = String.join("|", SINGLE_CLASS_METRIC_FACTORIES.keySet());
     Pattern SINGLE_CLASS_METRIC_PATTERN = Pattern.compile(

test-utils/src/main/java/org/neo4j/gds/BaseProcTest.java

@@ -22,6 +22,7 @@
 import org.assertj.core.api.HamcrestCondition;
 import org.hamcrest.Matcher;
 import org.intellij.lang.annotations.Language;
+import org.intellij.lang.annotations.RegExp;
 import org.junit.jupiter.api.AfterEach;
 import org.neo4j.gds.api.Graph;
 import org.neo4j.gds.compat.GraphDatabaseApiProxy;
@@ -95,15 +96,15 @@ protected void assertError(
 
     protected void assertErrorRegex(
         @Language("Cypher") String query,
-        String regex
+        @RegExp String regex
     ) {
         assertErrorRegex(query, emptyMap(), regex);
     }
 
     private void assertErrorRegex(
         @Language("Cypher") String query,
         Map<String, Object> queryParameters,
-        String regex
+        @RegExp String regex
     ) {
         assertError(query, queryParameters, ExceptionMessageMatcher.containsMessageRegex(regex));
     }