fix(api): add deprecated id alias in streaming KS list response

Match PR #182 pattern — include both id and requestId in list
response for Java API compatibility.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Sudip Sinha <Sudip.Sinha@RedHat.com>

Author: SudipSinha

src/endpoints/metrics/drift/kolmogorov_smirnov_streaming.py

@@ -342,6 +342,7 @@ async def list_ksteststreaming_requests(
                 and hasattr(request, "fit_columns")
             ):
                 request_dict = {
+                    "id": str(request_id),  # deprecated: use requestId
                     "requestId": str(request_id),
                     "modelId": request.model_id,
                     "metricName": METRIC_NAME,