Scope extension capabilities to invocation lifetimes (#41020)

## What changed

- Add callback lifetimes to extension `ToolCall`, `ToolEnvironment`, turn-input context, and skill-read request types.
- Require extension tool executors to handle calls for any invocation lifetime and tie their returned futures to that lifetime.
- Update built-in extensions, adapters, and tests to use the lifetime-scoped APIs without retaining host-owned environment capabilities.

GitOrigin-RevId: aca9ce3a1b6870df550bc84ec9308cc65533f161

codex-rs/ext/memories/src/tools/ad_hoc_note.rs

@@ -41,7 +41,7 @@ pub(super) struct AddAdHocNoteTool<B> {
     pub(super) metrics_client: Option<MetricsClient>,
 }
 
-impl<B> ToolExecutor<ToolCall> for AddAdHocNoteTool<B>
+impl<'call, B> ToolExecutor<ToolCall<'call>> for AddAdHocNoteTool<B>
 where
     B: MemoriesBackend,
 {
@@ -56,7 +56,10 @@ where
         )
     }
 
-    fn handle(&self, call: ToolCall) -> codex_extension_api::ToolExecutorFuture<'_> {
+    fn handle<'a>(&'a self, call: ToolCall<'call>) -> codex_extension_api::ToolExecutorFuture<'a>
+    where
+        'call: 'a,
+    {
         Box::pin(self.handle_call(call))
     }
 }
@@ -67,7 +70,7 @@ where
 {
     async fn handle_call(
         &self,
-        call: ToolCall,
+        call: ToolCall<'_>,
     ) -> Result<Box<dyn codex_extension_api::ToolOutput>, codex_extension_api::FunctionCallError>
     {
         let backend = self.backend.clone();

codex-rs/ext/memories/src/tools/list.rs

@@ -39,7 +39,7 @@ pub(super) struct ListTool<B> {
     pub(super) metrics_client: Option<MetricsClient>,
 }
 
-impl<B> ToolExecutor<ToolCall> for ListTool<B>
+impl<'call, B> ToolExecutor<ToolCall<'call>> for ListTool<B>
 where
     B: MemoriesBackend,
 {
@@ -54,7 +54,10 @@ where
         )
     }
 
-    fn handle(&self, call: ToolCall) -> codex_extension_api::ToolExecutorFuture<'_> {
+    fn handle<'a>(&'a self, call: ToolCall<'call>) -> codex_extension_api::ToolExecutorFuture<'a>
+    where
+        'call: 'a,
+    {
         Box::pin(self.handle_call(call))
     }
 }
@@ -65,7 +68,7 @@ where
 {
     async fn handle_call(
         &self,
-        call: ToolCall,
+        call: ToolCall<'_>,
     ) -> Result<Box<dyn codex_extension_api::ToolOutput>, codex_extension_api::FunctionCallError>
     {
         let backend = self.backend.clone();

codex-rs/ext/memories/src/tools/mod.rs

@@ -28,7 +28,7 @@ mod search;
 pub(crate) fn memory_tools<B>(
     backend: B,
     metrics_client: Option<MetricsClient>,
-) -> Vec<Arc<dyn ToolExecutor<ToolCall>>>
+) -> Vec<Arc<dyn for<'call> ToolExecutor<ToolCall<'call>>>>
 where
     B: MemoriesBackend,
 {
@@ -77,7 +77,7 @@ pub(super) fn memory_function_tool<I: JsonSchema, O: JsonSchema>(
     })
 }
 
-fn parse_args<T: for<'de> Deserialize<'de>>(call: &ToolCall) -> Result<T, FunctionCallError> {
+fn parse_args<T: for<'de> Deserialize<'de>>(call: &ToolCall<'_>) -> Result<T, FunctionCallError> {
     let arguments = call.function_arguments()?;
     let value = if arguments.trim().is_empty() {
         Value::Object(serde_json::Map::new())

codex-rs/ext/memories/src/tools/read.rs

@@ -38,7 +38,7 @@ pub(super) struct ReadTool<B> {
     pub(super) metrics_client: Option<MetricsClient>,
 }
 
-impl<B> ToolExecutor<ToolCall> for ReadTool<B>
+impl<'call, B> ToolExecutor<ToolCall<'call>> for ReadTool<B>
 where
     B: MemoriesBackend,
 {
@@ -53,7 +53,10 @@ where
         )
     }
 
-    fn handle(&self, call: ToolCall) -> codex_extension_api::ToolExecutorFuture<'_> {
+    fn handle<'a>(&'a self, call: ToolCall<'call>) -> codex_extension_api::ToolExecutorFuture<'a>
+    where
+        'call: 'a,
+    {
         Box::pin(self.handle_call(call))
     }
 }
@@ -64,7 +67,7 @@ where
 {
     async fn handle_call(
         &self,
-        call: ToolCall,
+        call: ToolCall<'_>,
     ) -> Result<Box<dyn codex_extension_api::ToolOutput>, codex_extension_api::FunctionCallError>
     {
         let backend = self.backend.clone();

codex-rs/ext/memories/src/tools/search.rs

@@ -47,7 +47,7 @@ pub(super) struct SearchTool<B> {
     pub(super) metrics_client: Option<MetricsClient>,
 }
 
-impl<B> ToolExecutor<ToolCall> for SearchTool<B>
+impl<'call, B> ToolExecutor<ToolCall<'call>> for SearchTool<B>
 where
     B: MemoriesBackend,
 {
@@ -62,7 +62,10 @@ where
         )
     }
 
-    fn handle(&self, call: ToolCall) -> codex_extension_api::ToolExecutorFuture<'_> {
+    fn handle<'a>(&'a self, call: ToolCall<'call>) -> codex_extension_api::ToolExecutorFuture<'a>
+    where
+        'call: 'a,
+    {
         Box::pin(self.handle_call(call))
     }
 }
@@ -73,7 +76,7 @@ where
 {
     async fn handle_call(
         &self,
-        call: ToolCall,
+        call: ToolCall<'_>,
     ) -> Result<Box<dyn codex_extension_api::ToolOutput>, codex_extension_api::FunctionCallError>
     {
         let backend = self.backend.clone();