[router] Fix all unused_qualifications (#11341)

sgl-router/src/data_connector/responses.rs

@@ -51,10 +51,10 @@ pub struct StoredResponse {
     pub output: String,
 
     /// Tool calls made by the model (if any)
-    pub tool_calls: Vec<serde_json::Value>,
+    pub tool_calls: Vec<Value>,
 
     /// Custom metadata
-    pub metadata: HashMap<String, serde_json::Value>,
+    pub metadata: HashMap<String, Value>,
 
     /// When this response was created
     pub created_at: chrono::DateTime<chrono::Utc>,
@@ -95,7 +95,7 @@ pub struct ResponseChain {
     pub responses: Vec<StoredResponse>,
 
     /// Metadata about the chain
-    pub metadata: HashMap<String, serde_json::Value>,
+    pub metadata: HashMap<String, Value>,
 }
 
 impl Default for ResponseChain {