Stop depending on manifest.total_chunk_count in bounded SEA CloudFetch path

Per the bounded SEA API contract, drivers must not depend on
manifest.{chunks, total_chunk_count, total_row_count}. Pass null for
totalChunkCount when converting initial ExternalLinks for
StreamingChunkProvider — the provider derives end-of-stream from
next_chunk_index on ExternalLink instead.

Signed-off-by: Gopal Lal <gopal.lal@databricks.com>

Co-authored-by: Isaac
Signed-off-by: Gopal Lal <gopal.lal@databricks.com>

Author: gopalldb

src/main/java/com/databricks/jdbc/api/impl/arrow/ArrowStreamResult.java

@@ -115,10 +115,13 @@ private static ChunkProvider createRemoteChunkProvider(
       int chunkReadyTimeoutSeconds = connectionContext.getChunkReadyTimeoutSeconds();
       double cloudFetchSpeedThreshold = connectionContext.getCloudFetchSpeedThreshold();
 
-      // Convert ExternalLinks to ChunkLinkFetchResult for the provider
+      // Convert ExternalLinks to ChunkLinkFetchResult for the provider.
+      // Bounded SEA API: pass null for totalChunkCount — we must not depend on
+      // manifest.{chunks, total_chunk_count, total_row_count} per the bounded API contract.
+      Long totalChunkCount =
+          connectionContext.isBoundedSeaApiEnabled() ? null : resultManifest.getTotalChunkCount();
       ChunkLinkFetchResult initialLinks =
-          convertToChunkLinkFetchResult(
-              resultData.getExternalLinks(), resultManifest.getTotalChunkCount());
+          convertToChunkLinkFetchResult(resultData.getExternalLinks(), totalChunkCount);
 
       return new StreamingChunkProvider(
           linkFetcher,