Normalize TIMESTAMP_NTZ to TIMESTAMP in Thrift path for metadata consistency (databricks#1182)

## Summary
This PR adds TIMESTAMP_NTZ normalization in the Thrift path to ensure
consistent metadata behavior across both SEA and Thrift API paths.

## Background
PR databricks#1177 moved Arrow metadata extraction earlier in the processing
pipeline, which exposed an inconsistency: the Thrift path started
returning the correct "TIMESTAMP_NTZ" from server metadata, while the
SEA path was already normalizing it to "TIMESTAMP" for backward
compatibility.

## Changes
- Added TIMESTAMP_NTZ → TIMESTAMP normalization in
`DatabricksResultSetMetaData.java` Thrift constructor (lines 205-208)
- This brings Thrift path behavior in line with existing SEA path
normalization
- Fixes test failure in
`PreparedStatementIntegrationTests.testGetMetaData_NoResultSet`

## Testing
- ✅ Local test run:
`PreparedStatementIntegrationTests.testGetMetaData_NoResultSet` passes
- ✅ Metadata now consistent before and after `executeQuery()` for
TIMESTAMP_NTZ columns
- ✅ Both SEA and Thrift paths return "TIMESTAMP" for TIMESTAMP_NTZ
columns

## Related
- Builds on PR databricks#1177 (Fix Arrow field metadata not available for queries
with 0 rows)
- Fixes issue introduced by early metadata extraction in PR databricks#1177
- Maintains backward compatibility with existing behavior

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: gopalldb

NEXT_CHANGELOG.md

@@ -9,6 +9,7 @@
 
 ### Fixed
 - Fixed complex data type metadata support when retrieving 0 rows in Arrow format
+- Normalized TIMESTAMP_NTZ to TIMESTAMP in Thrift path for consistency with SEA behavior
 
 ---
 *Note: When making changes, please add your change under the appropriate section

src/main/java/com/databricks/jdbc/api/impl/DatabricksResultSetMetaData.java

@@ -201,6 +201,12 @@ public DatabricksResultSetMetaData(
                       && arrowMetadata.get(columnIndex) != null)
                   ? arrowMetadata.get(columnIndex)
                   : getTypeTextFromTypeDesc(columnDesc.getTypeDesc());
+
+          // Normalize TIMESTAMP_NTZ to TIMESTAMP for consistency with SEA path
+          if (columnTypeText != null && columnTypeText.equalsIgnoreCase(TIMESTAMP_NTZ)) {
+            columnTypeText = TIMESTAMP;
+          }
+
           columnBuilder
               .columnName(columnInfo.getName())
               .columnTypeClassName(