Restore JSR 305 annotations (#2238)

Author: basil

plugin/pom.xml

@@ -66,6 +66,11 @@
       <artifactId>json</artifactId>
       <version>20230227</version>
     </dependency>
+    <dependency>
+      <groupId>com.google.code.findbugs</groupId>
+      <artifactId>jsr305</artifactId>
+      <version>3.0.2</version>
+    </dependency>
     <dependency>
       <groupId>io.jenkins.plugins</groupId>
       <artifactId>snakeyaml-api</artifactId>