Nomad changes

docs/snippets/java/plugins/plugin_validator.md

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+```java title="Java"
+import dev.kreuzberg.IValidator;
+import dev.kreuzberg.ExtractionConfig;
+import dev.kreuzberg.ExtractionResult;
+import dev.kreuzberg.ValidatorBridge;
+
+// Generic validator pattern: every IValidator has the same shape.
+// name() keys the registry, priority() orders execution (higher = earlier),
+// should_validate() is a fast skip-check, and validate() throws on failure.
+public class GenericValidator implements IValidator {
+    private final String pluginName;
+    private final int pluginPriority;
+
+    public GenericValidator(String pluginName, int pluginPriority) {
+        this.pluginName = pluginName;
+        this.pluginPriority = pluginPriority;
+    }
+
+    @Override
+    public String name() {
+        return pluginName;
+    }
+
+    @Override
+    public String version() {
+        return "1.0.0";
+    }
+
+    @Override
+    public void initialize() {
+        // Optional: open resources, load config files, etc.
+    }
+
+    @Override
+    public void shutdown() {
+        // Optional: release resources held in initialize().
+    }
+
+    @Override
+    public void validate(ExtractionResult result, ExtractionConfig config) throws Exception {
+        if (result.content() == null || result.content().isBlank()) {
+            throw new IllegalArgumentException("Extracted content is blank");
+        }
+    }
+
+    @Override
+    public boolean should_validate(ExtractionResult _result, ExtractionConfig _config) {
+        return true;
+    }
+
+    @Override
+    public int priority() {
+        return pluginPriority;
+    }
+
+    public static void registerGenericValidator() {
+        GenericValidator validator = new GenericValidator("non-empty-content", 200);
+        ValidatorBridge.registerValidator(validator);
+    }
+}
+```