feat(eap): add downsampled_event_retention to project configs

Author: brendanhsentry

relay-dynamic-config/src/project.rs

@@ -44,6 +44,9 @@ pub struct ProjectConfig {
     /// Maximum event retention for the organization.
     #[serde(skip_serializing_if = "Option::is_none")]
     pub event_retention: Option<u16>,
+    /// Maximum sampled event retention for the organization.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub downsampled_event_retention: Option<u16>,
     /// Usage quotas for this project.
     #[serde(skip_serializing_if = "Vec::is_empty")]
     pub quotas: Vec<Quota>,
@@ -138,6 +141,7 @@ impl Default for ProjectConfig {
             filter_settings: ProjectFiltersConfig::default(),
             datascrubbing_settings: DataScrubbingConfig::default(),
             event_retention: None,
+            downsampled_event_retention: None,
             quotas: Vec::new(),
             sampling: None,
             measurements: None,