ci: log broker info before tests and upload server logs as artifacts

- Restart Redis with --logfile before non-cluster tests so logs are
  captured (producer, integration, reactive jobs)
- Add logfile directive per node in Redis cluster config
- Start NATS server with log file redirect; log version in dedicated step
- Upload redis/nats server logs as artifacts after each job:
  producer-redis-server, integration-redis-server, reactive-redis-server,
  redis-server-cluster, nats-server

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: sonus21

.github/workflows/java-ci.yaml

@@ -152,7 +152,7 @@ jobs:
         if: always()
         uses: actions/upload-artifact@v4
         with:
-          name: redis-server
+          name: producer-redis-server
           path: /tmp/redis.log
           if-no-files-found: ignore
 
@@ -219,7 +219,7 @@ jobs:
         if: always()
         uses: actions/upload-artifact@v4
         with:
-          name: redis-server
+          name: integration-redis-server
           path: /tmp/redis.log
           if-no-files-found: ignore
 
@@ -372,7 +372,7 @@ jobs:
         if: always()
         uses: actions/upload-artifact@v4
         with:
-          name: redis-server-log-reactive
+          name: reactive-redis-server
           path: /tmp/redis.log
           if-no-files-found: ignore
 
@@ -454,7 +454,7 @@ jobs:
         if: always()
         uses: actions/upload-artifact@v4
         with:
-          name: nats-server-log
+          name: nats-server
           path: /tmp/nats.log
           if-no-files-found: ignore