feat(sdk): AuthConfigs, JSON Schema, examples, and release checksum CI

Add craftlabs-auth-config.schema.json, Java AuthConfigs model with tests,
example configs aligned to BP-10, C/Java/auth-config documentation,
native header notes, RELEASING guide, and workflow to verify SDK
artifact checksums on release tags.

Made-with: Cursor

java/craftlabs-auth-tests/pom.xml

@@ -28,6 +28,8 @@
     </dependencies>
 
     <properties>
+        <!-- 测试模块不发布；跳过 GPG 以免生成多余 .asc -->
+        <gpg.skip>true</gpg.skip>
         <native.library.path>${project.basedir}/../../native/build</native.library.path>
     </properties>