tweak parameters to enhance reindex performance

• Use max 'limit' param value (1000) to fetch record-ids from Storage for kind.
• Batch 1k record-ids to 50 (same limit as Storage PUT API record-changed event).

With these changes, we see 5x performance improvements on reindex API.

provider/indexer-azure/src/main/java/org/opengroup/osdu/indexer/azure/di/PublisherConfig.java

+// Copyright © Schlumberger
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package org.opengroup.osdu.indexer.azure.di;
+
+import lombok.Getter;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@Getter
+public class PublisherConfig {
+
+    @Value("${azure.publisher.batchsize:50}")
+    private Integer pubSubBatchSize;
+}
+