Expose disabled plugin settings in the app-server API (#44905)

## What changed

- Accept `disabledPluginIds` in `thread/settings/update` and `turn/start`. A supplied list replaces the saved selection; omission or `null` preserves it, and `[]` clears it.
- Return the selection in thread start, resume, and fork responses and `thread/settings/updated` notifications. Update generated schemas and client types.
- Restore disabled plugin IDs from the history retained at the requested fork boundary, preserving explicit overrides.

The selection persists across resume but does not yet filter plugin capabilities.

## Testing

Add coverage for replacing, preserving, and clearing selections without inference; turn-start notifications; resume; and fork boundaries across legacy and paginated history, with loaded and restarted parents. Add a core regression test for history restoration and explicit clearing.

GitOrigin-RevId: 654a8c2a0527228d422c0dd4919228447e2663db

codex-rs/app-server/src/request_processors/thread_processor.rs

@@ -1617,6 +1617,7 @@ impl ThreadRequestProcessor {
 
         let response = ThreadStartResponse {
             thread: thread.clone(),
+            disabled_plugin_ids: config_snapshot.disabled_plugin_ids,
             model: config_snapshot.model,
             model_provider: config_snapshot.model_provider_id,
             service_tier: config_snapshot.service_tier,
@@ -4177,6 +4178,7 @@ impl ThreadRequestProcessor {
                 let thread_originator = config_snapshot.originator.clone();
                 let response = ThreadResumeResponse {
                     thread,
+                    disabled_plugin_ids: config_snapshot.disabled_plugin_ids,
                     model: session_configured.model,
                     model_provider: session_configured.model_provider_id,
                     service_tier: session_configured.service_tier,
@@ -5369,6 +5371,7 @@ impl ThreadRequestProcessor {
         let thread_originator = config_snapshot.originator.clone();
         let response = ThreadForkResponse {
             thread: thread.clone(),
+            disabled_plugin_ids: config_snapshot.disabled_plugin_ids,
             model: session_configured.model,
             model_provider: session_configured.model_provider_id,
             service_tier: session_configured.service_tier,