test(vectordata): tag unit suites for the CI groups filter

Surefire runs only tests tagged 'unit' (nb.junit.tags), so the module's
untagged suites were invisible to 'mvn -B test' in CI. Tag every unit
test class; the *IntegrationTest suites already run under failsafe.

nb-vectordata/src/test/java/io/nosqlbench/vectordata/CatalogManifestTest.java

@@ -15,6 +15,7 @@
  */
 package io.nosqlbench.vectordata;
 
+import org.junit.jupiter.api.Tag;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.io.TempDir;
 
@@ -23,6 +24,7 @@ import java.nio.file.Path;
 
 import static org.junit.jupiter.api.Assertions.*;
 
+@Tag("unit")
 class CatalogManifestTest {
     @TempDir Path temporary;
     @Test void resolvesCatalogProfilesInheritanceAliasesAndCustomFacets() throws Exception {

nb-vectordata/src/test/java/io/nosqlbench/vectordata/FormatCompatibilityTest.java

@@ -15,6 +15,7 @@
  */
 package io.nosqlbench.vectordata;
 
+import org.junit.jupiter.api.Tag;
 import org.junit.jupiter.api.Test;
 
 import java.net.URI;
@@ -22,6 +23,7 @@ import java.net.URI;
 import static org.junit.jupiter.api.Assertions.assertArrayEquals;
 
 /** Verifies the checked-in catalog and binary xvec format fixture through the public API. */
+@Tag("unit")
 class FormatCompatibilityTest {
     @Test void readsCheckedInFormatFixtureThroughCatalogApi() throws Exception {
         URI catalogUri = getClass().getClassLoader().getResource("rust-v1/catalog.yaml").toURI();

nb-vectordata/src/test/java/io/nosqlbench/vectordata/VectorDataSettingsTest.java

@@ -15,6 +15,7 @@
  */
 package io.nosqlbench.vectordata;
 
+import org.junit.jupiter.api.Tag;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.io.TempDir;
 
@@ -24,6 +25,7 @@ import java.nio.file.Path;
 import static org.junit.jupiter.api.Assertions.*;
 
 /** Settings tests use explicit temporary roots and never inspect or write user configuration. */
+@Tag("unit")
 class VectorDataSettingsTest {
     @TempDir Path temporary;
 

nb-vectordata/src/test/java/io/nosqlbench/vectordata/VectorReadersTest.java

@@ -15,6 +15,7 @@
  */
 package io.nosqlbench.vectordata;
 
+import org.junit.jupiter.api.Tag;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.io.TempDir;
 
@@ -22,6 +23,7 @@ import java.nio.file.Path;
 
 import static org.junit.jupiter.api.Assertions.*;
 
+@Tag("unit")
 class VectorReadersTest {
     @TempDir Path temporary;
     @Test void readsFixedVectorsAndCopiesToCallerArray() throws Exception {