Add clarification on metrics parameter filter[hours_ago] (#2194)

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 19:02:50.038339",
-            "spec_repo_commit": "5ef419de"
+            "regenerated": "2024-02-21 12:50:48.376475",
+            "spec_repo_commit": "1ec2d96a"
         },
         "v2": {
             "apigentools_version": "1.6.6",
-            "regenerated": "2024-02-20 19:02:50.054420",
-            "spec_repo_commit": "5ef419de"
+            "regenerated": "2024-02-21 12:50:48.392799",
+            "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.

src/main/java/com/datadog/api/client/v2/api/MetricsApi.java

@@ -682,7 +682,8 @@ public EstimateMetricsOutputSeriesOptionalParameters filterGroups(String filterG
      * Set filterHoursAgo.
      *
      * @param filterHoursAgo The number of hours of look back (from now) to estimate cardinality
-     *     with. (optional)
+     *     with. Estimates are based on historical data, and unspecified fields default to the
+     *     minimum 49 hours. (optional)
      * @return EstimateMetricsOutputSeriesOptionalParameters
      */
     public EstimateMetricsOutputSeriesOptionalParameters filterHoursAgo(Integer filterHoursAgo) {