library test suite for drop validation, fixed drop return structures

src/drop.rs

@@ -13,7 +13,7 @@ pub struct Drop {
   #[serde(skip_serializing_if = "Option::is_none")]
   pub response: Option<Value>,
 
-  #[serde(default)]
+  #[serde(default, skip_serializing_if = "Vec::is_empty")]
   pub errors: Vec<Error>,
 }
 
@@ -29,7 +29,7 @@ impl Drop {
   pub fn success() -> Self {
     Self {
       type_: "drop".to_string(),
-      response: Some(serde_json::json!({ "result": "success" })), // Or appropriate success response
+      response: Some(serde_json::json!("success")),
       errors: vec![],
     }
   }
@@ -53,8 +53,6 @@ impl Drop {
 
 #[derive(Debug, Serialize, Deserialize, Clone)]
 pub struct Error {
-  #[serde(skip_serializing_if = "Option::is_none")]
-  pub punc: Option<String>,
   pub code: String,
   pub message: String,
   pub details: ErrorDetails,