Migrate from legacy OSSRH to Sonatype Central Portal

Replace nexus-staging-maven-plugin with central-publishing-maven-plugin
(v0.10.0) as oss.sonatype.org has been sunset. The deploy was failing
with 401 because OSSRH doesn't accept Central Portal tokens.

Changes:
- Replace nexus-staging-maven-plugin with central-publishing-maven-plugin
- Update distributionManagement to use 'central' server ID
- Update release.yml server-id to match
- Enable autoPublish for CI deployments

https://claude.ai/code/session_01ToqqHtNtg7kdm8TmAMZYe8

Author: claude

.github/workflows/release.yml

@@ -15,7 +15,7 @@ jobs:
         with:
           java-version: '11'
           distribution: 'temurin'
-          server-id: maven-central-staging
+          server-id: central
           server-username: MAVEN_USERNAME
           server-password: MAVEN_PASSWORD
           gpg-private-key: ${{ secrets.GPG_PRIVATE_KEY }}

pom.xml

@@ -27,12 +27,10 @@
   </scm>
   <distributionManagement>
     <repository>
-      <id>maven-central-staging</id>
-      <url>https://oss.sonatype.org/service/local/staging/deploy/maven2</url>
+      <id>central</id>
     </repository>
     <snapshotRepository>
-      <id>maven-central-snapshots</id>
-      <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+      <id>central</id>
     </snapshotRepository>
   </distributionManagement>
   <properties>
@@ -184,14 +182,13 @@
         </executions>
       </plugin>
       <plugin>
-        <groupId>org.sonatype.plugins</groupId>
-        <artifactId>nexus-staging-maven-plugin</artifactId>
-        <version>1.7.0</version>
-        <extensions>false</extensions>
+        <groupId>org.sonatype.central</groupId>
+        <artifactId>central-publishing-maven-plugin</artifactId>
+        <version>0.10.0</version>
+        <extensions>true</extensions>
         <configuration>
-          <serverId>maven-central-staging</serverId>
-          <nexusUrl>https://oss.sonatype.org</nexusUrl>
-          <autoReleaseAfterClose />
+          <publishingServerId>central</publishingServerId>
+          <autoPublish>true</autoPublish>
         </configuration>
       </plugin>
       <plugin>