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/core/src/session/turn.rs

@@ -1,5 +1,6 @@
 use std::collections::HashMap;
 use std::collections::HashSet;
+use std::marker::PhantomData;
 use std::sync::Arc;
 use std::sync::atomic::Ordering;
 
@@ -931,6 +932,7 @@ async fn build_extension_turn_input_items(
         .turn_environments()
         .enumerate()
         .map(|(index, environment)| TurnInputEnvironment {
+            _lifetime: PhantomData,
             environment_id: environment.selection.environment_id.clone(),
             cwd: environment.cwd().clone(),
             is_primary: index == 0,