Make multi_agent_v2 wait_agent timeouts configurable (#22528)

## Why

`multi_agent_v2` already allowed configuring the minimum `wait_agent`
timeout, but the default timeout and upper bound were still hard-coded.
That made it hard to tune waits for subagent mailbox activity in
sessions that need either faster wakeups or longer waits, and it meant
the model-visible `wait_agent` schema could not fully reflect the
resolved runtime limits.

## What Changed

- Added `features.multi_agent_v2.max_wait_timeout_ms` and
`features.multi_agent_v2.default_wait_timeout_ms` alongside the existing
`min_wait_timeout_ms` setting.
- Validated all three timeouts in config as `0..=3_600_000`, with
`min_wait_timeout_ms <= default_wait_timeout_ms <= max_wait_timeout_ms`.
- Thread and review session tool config now passes the resolved
min/default/max values into the `wait_agent` tool schema.
- `wait_agent` now uses the configured default when `timeout_ms` is
omitted and rejects explicit values outside the configured min/max range
instead of silently clamping them.
- Updated the generated config schema and config-lock test coverage for
the new fields.

codex-rs/tools/src/tool_config.rs

@@ -123,6 +123,8 @@ pub struct ToolsConfig {
     pub spawn_agent_usage_hint_text: Option<String>,
     pub max_concurrent_threads_per_session: Option<usize>,
     pub wait_agent_min_timeout_ms: Option<i64>,
+    pub wait_agent_max_timeout_ms: Option<i64>,
+    pub wait_agent_default_timeout_ms: Option<i64>,
     pub request_user_input_available_modes: Vec<ModeKind>,
     pub experimental_supported_tools: Vec<String>,
     pub agent_jobs_tools: bool,
@@ -264,6 +266,8 @@ impl ToolsConfig {
             spawn_agent_usage_hint_text: None,
             max_concurrent_threads_per_session: None,
             wait_agent_min_timeout_ms: None,
+            wait_agent_max_timeout_ms: None,
+            wait_agent_default_timeout_ms: None,
             request_user_input_available_modes: request_user_input_available_modes(features),
             experimental_supported_tools: model_info.experimental_supported_tools.clone(),
             agent_jobs_tools: include_agent_jobs,
@@ -346,6 +350,22 @@ impl ToolsConfig {
         self
     }
 
+    pub fn with_wait_agent_max_timeout_ms(
+        mut self,
+        wait_agent_max_timeout_ms: Option<i64>,
+    ) -> Self {
+        self.wait_agent_max_timeout_ms = wait_agent_max_timeout_ms;
+        self
+    }
+
+    pub fn with_wait_agent_default_timeout_ms(
+        mut self,
+        wait_agent_default_timeout_ms: Option<i64>,
+    ) -> Self {
+        self.wait_agent_default_timeout_ms = wait_agent_default_timeout_ms;
+        self
+    }
+
     pub fn with_allow_login_shell(mut self, allow_login_shell: bool) -> Self {
         self.allow_login_shell = allow_login_shell;
         self