chore: detail add variation-index

Author: SSebo

examples/demo.rs

@@ -12,7 +12,7 @@ async fn main() {
 
     let remote_url = "http://localhost:4007";
     let server_sdk_key = "server-8ed48815ef044428826787e9a238b9c6a479f98c";
-    let interval = Duration::from_millis(100);
+    let interval = Duration::from_millis(1000);
     let config = FPConfig {
         remote_url: remote_url.to_owned(),
         server_sdk_key: server_sdk_key.to_owned(),

src/feature_probe.rs

@@ -128,6 +128,7 @@ impl FeatureProbe {
             value,
             reason: reason.unwrap_or(detail.reason),
             rule_index: detail.rule_index,
+            variation_index: detail.variation_index,
             version: detail.version,
         }
     }

src/lib.rs

@@ -25,6 +25,7 @@ const VERSION: &str = env!("CARGO_PKG_VERSION");
 pub struct FPDetail<T: Default + Debug> {
     pub value: T,
     pub rule_index: Option<usize>,
+    pub variation_index: Option<usize>,
     pub version: Option<u64>,
     pub reason: String,
 }