registry: type metadata and yaml import timestamps

crates/crank-registry/src/model.rs

@@ -261,7 +261,8 @@ pub struct OperationSampleMetadata {
     pub storage_ref: String,
     pub content_type: String,
     pub file_name: Option<String>,
-    pub created_at: String,
+    #[serde(with = "time::serde::rfc3339")]
+    pub created_at: OffsetDateTime,
 }
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
@@ -283,7 +284,8 @@ pub struct DescriptorMetadata {
     pub storage_ref: String,
     pub source_name: Option<String>,
     pub package_index: Option<Value>,
-    pub created_at: String,
+    #[serde(with = "time::serde::rfc3339")]
+    pub created_at: OffsetDateTime,
 }
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
@@ -304,8 +306,10 @@ pub struct YamlImportJob {
     pub result_operation_id: Option<OperationId>,
     pub result_version: Option<u32>,
     pub error_text: Option<String>,
-    pub created_at: String,
-    pub finished_at: Option<String>,
+    #[serde(with = "time::serde::rfc3339")]
+    pub created_at: OffsetDateTime,
+    #[serde(with = "time::serde::rfc3339::option")]
+    pub finished_at: Option<OffsetDateTime>,
 }
 
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
@@ -314,7 +318,8 @@ pub struct YamlImportJobCompletion {
     pub result_operation_id: Option<OperationId>,
     pub result_version: Option<u32>,
     pub error_text: Option<String>,
-    pub finished_at: String,
+    #[serde(with = "time::serde::rfc3339")]
+    pub finished_at: OffsetDateTime,
 }
 
 #[derive(Clone, Debug, PartialEq)]
@@ -380,7 +385,7 @@ pub struct CreateYamlImportJobRequest<'a> {
     pub source_sample_id: Option<&'a SampleId>,
     pub format_version: &'a str,
     pub mode: ExportMode,
-    pub created_at: &'a str,
+    pub created_at: &'a OffsetDateTime,
 }
 
 #[derive(Clone, Debug, PartialEq, Eq)]