Add clarification on metrics parameter filter[hours_ago] (#1527)

Co-authored-by: ci.datadog-api-spec <packages@datadoghq.com>
Co-authored-by: api-clients-generation-pipeline[bot] <54105614+api-clients-generation-pipeline[bot]@users.noreply.github.com>

Author: api-clients-generation-pipeline[bot]

.apigentools-info

@@ -4,13 +4,13 @@
     "spec_versions": {
         "v1": {
             "apigentools_version": "1.6.6",
-            "regenerated": "2024-02-20 19:02:28.868806",
-            "spec_repo_commit": "5ef419de"
+            "regenerated": "2024-02-21 12:50:38.923679",
+            "spec_repo_commit": "1ec2d96a"
         },
         "v2": {
             "apigentools_version": "1.6.6",
-            "regenerated": "2024-02-20 19:02:28.888150",
-            "spec_repo_commit": "5ef419de"
+            "regenerated": "2024-02-21 12:50:38.947728",
+            "spec_repo_commit": "1ec2d96a"
         }
     }
 }

.generator/schemas/v2/openapi.yaml

@@ -28095,14 +28095,16 @@ paths:
         schema:
           type: string
       - description: The number of hours of look back (from now) to estimate cardinality
-          with.
+          with. Estimates are based on historical data, and unspecified fields default
+          to the minimum 49 hours.
         example: 49
         in: query
         name: filter[hours_ago]
         required: false
         schema:
           format: int32
           maximum: 2147483647
+          minimum: 49
           type: integer
       - description: The number of aggregations that a `count`, `rate`, or `gauge`
           metric is configured to use. Max number of aggregation combos is 9.

packages/datadog-api-client-v2/apis/MetricsApi.ts

@@ -1628,7 +1628,7 @@ export interface MetricsApiEstimateMetricsOutputSeriesRequest {
    */
   filterGroups?: string;
   /**
-   * The number of hours of look back (from now) to estimate cardinality with.
+   * The number of hours of look back (from now) to estimate cardinality with. Estimates are based on historical data, and unspecified fields default to the minimum 49 hours.
    * @type number
    */
   filterHoursAgo?: number;