Allow apm metrics data source for distribution histogram request

.generator/schemas/v1/openapi.yaml

@@ -2080,6 +2080,7 @@ components:
         - $ref: "#/components/schemas/FormulaAndFunctionMetricQueryDefinition"
         - $ref: "#/components/schemas/FormulaAndFunctionEventQueryDefinition"
         - $ref: "#/components/schemas/FormulaAndFunctionApmResourceStatsQueryDefinition"
+        - $ref: "#/components/schemas/FormulaAndFunctionApmMetricsQueryDefinition"
     DistributionWidgetRequest:
       description: Updated distribution widget.
       properties:

src/datadog_api_client/v1/model/distribution_widget_histogram_request_query.py

@@ -68,6 +68,21 @@ def __init__(self, **kwargs):
 
         :param stat: APM resource stat name.
         :type stat: FormulaAndFunctionApmResourceStatName
+
+        :param operation_mode: Optional operation mode to aggregate across operation names.
+        :type operation_mode: str, optional
+
+        :param peer_tags: Tags to query for a specific downstream entity (peer.service, peer.db_instance, peer.s3, peer.s3.bucket, etc.).
+        :type peer_tags: [str], optional
+
+        :param query_filter: Additional filters for the query using metrics query syntax (e.g., env, primary_tag).
+        :type query_filter: str, optional
+
+        :param resource_hash: The hash of a specific resource to filter by.
+        :type resource_hash: str, optional
+
+        :param span_kind: Describes the relationship between the span, its parents, and its children in a trace.
+        :type span_kind: FormulaAndFunctionApmMetricsSpanKind, optional
         """
         super().__init__(kwargs)
 
@@ -89,11 +104,15 @@ def _composed_schemas(_):
         from datadog_api_client.v1.model.formula_and_function_apm_resource_stats_query_definition import (
             FormulaAndFunctionApmResourceStatsQueryDefinition,
         )
+        from datadog_api_client.v1.model.formula_and_function_apm_metrics_query_definition import (
+            FormulaAndFunctionApmMetricsQueryDefinition,
+        )
 
         return {
             "oneOf": [
                 FormulaAndFunctionMetricQueryDefinition,
                 FormulaAndFunctionEventQueryDefinition,
                 FormulaAndFunctionApmResourceStatsQueryDefinition,
+                FormulaAndFunctionApmMetricsQueryDefinition,
             ],
         }

src/datadog_api_client/v1/model/distribution_widget_request.py

@@ -148,6 +148,7 @@ def __init__(
             FormulaAndFunctionMetricQueryDefinition,
             FormulaAndFunctionEventQueryDefinition,
             FormulaAndFunctionApmResourceStatsQueryDefinition,
+            FormulaAndFunctionApmMetricsQueryDefinition,
             UnsetType,
         ] = unset,
         request_type: Union[WidgetHistogramRequestType, UnsetType] = unset,