feat: add shutdown() function to provider trait

README.md

@@ -6,33 +6,21 @@ This is the rust implementation of [OpenFeature](https://openfeature.dev), a ven
 
 We support multiple data types for flags (numbers, strings, booleans, objects) as well as hooks, which can alter the lifecycle of a flag evaluation.
 
-
 ## Installation
 
-```
-rust-sdk = { git = "https://github.com/open-feature/rust-sdk", branch = "main" }
+```toml
+open-feature = { git = "https://github.com/open-feature/rust-sdk", branch = "main" }
 ```
 
 ## Usage
 
 ### Initialization
 
-```rust
-use rust_sdk::OpenFeatureClient;
-use rust_sdk::providers::NoopProvider;
-use rust_sdk::providers::traits::FeatureProvider;
-use rust_sdk::traits::Client;
+TBD
 
+## Roadmap
 
-fn main() {
-
-    let client = OpenFeatureClient::<NoopProvider>::new(
-        "client-name".to_string(),
-        NoopProvider::new(),
-    );
-    let result = client.value::<i64>("flag-key-here".to_string(),
-        0, client.evaluation_context() );
-    println!("result: {}", result.unwrap());
-}
+## Pending Feature List
+
+- [ ] Provider hooks (2.3.*)
 
-```

src/provider/feature_provider.rs

@@ -32,16 +32,18 @@ pub trait FeatureProvider: Send + Sync + 'static {
     /// abnormally.
     /// * The provider SHOULD indicate an error if flag resolution is attempted before the provider
     /// is ready.
-    ///
-    /// Implement [`Drop`] trait for the "shutdown" functions.
-    fn initialize(&mut self, context: EvaluationContext) {}
+    async fn initialize(&mut self, context: EvaluationContext) {}
+
+    /// The provider MAY define a shutdown function to perform whatever cleanup is necessary for
+    /// the implementation.
+    async fn shutdown(&mut self) {}
 
     /// The provider MAY define a status field/accessor which indicates the readiness of the
     /// provider, with possible values NOT_READY, READY, or ERROR.
     ///
     /// Providers without this field can be assumed to be ready immediately.
     fn status(&self) -> ProviderStatus {
-        ProviderStatus::default()
+        ProviderStatus::Ready
     }
 
     /// The provider interface MUST define a metadata member or accessor, containing a name field