chore(app-server): mark thread/rollback as deprecated (#29928)

We will drop support for this in the near future due to the complexity
it introduces.

codex-rs/app-server-protocol/schema/json/ClientRequest.json

@@ -4174,6 +4174,7 @@
       "type": "object"
     },
     "ThreadRollbackParams": {
+      "description": "DEPRECATED: `thread/rollback` will be removed soon.",
       "properties": {
         "numTurns": {
           "description": "The number of turns to drop from the end of the thread. Must be >= 1.\n\nThis only modifies the thread's history and does not revert local file changes that have been made by the agent. Clients are responsible for reverting these changes.",

codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json

@@ -18997,6 +18997,7 @@
       },
       "ThreadRollbackParams": {
         "$schema": "http://json-schema.org/draft-07/schema#",
+        "description": "DEPRECATED: `thread/rollback` will be removed soon.",
         "properties": {
           "numTurns": {
             "description": "The number of turns to drop from the end of the thread. Must be >= 1.\n\nThis only modifies the thread's history and does not revert local file changes that have been made by the agent. Clients are responsible for reverting these changes.",

codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.v2.schemas.json

@@ -16776,6 +16776,7 @@
     },
     "ThreadRollbackParams": {
       "$schema": "http://json-schema.org/draft-07/schema#",
+      "description": "DEPRECATED: `thread/rollback` will be removed soon.",
       "properties": {
         "numTurns": {
           "description": "The number of turns to drop from the end of the thread. Must be >= 1.\n\nThis only modifies the thread's history and does not revert local file changes that have been made by the agent. Clients are responsible for reverting these changes.",

codex-rs/app-server-protocol/schema/json/v2/ThreadRollbackParams.json

@@ -1,5 +1,6 @@
 {
   "$schema": "http://json-schema.org/draft-07/schema#",
+  "description": "DEPRECATED: `thread/rollback` will be removed soon.",
   "properties": {
     "numTurns": {
       "description": "The number of turns to drop from the end of the thread. Must be >= 1.\n\nThis only modifies the thread's history and does not revert local file changes that have been made by the agent. Clients are responsible for reverting these changes.",

codex-rs/app-server-protocol/schema/typescript/v2/ThreadRollbackParams.ts

@@ -2,6 +2,9 @@
 
 // This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
 
+/**
+ * DEPRECATED: `thread/rollback` will be removed soon.
+ */
 export type ThreadRollbackParams = { threadId: string,
 /**
  * The number of turns to drop from the end of the thread. Must be >= 1.

codex-rs/app-server-protocol/src/protocol/v2/thread.rs

@@ -1025,6 +1025,7 @@ pub struct ThreadBackgroundTerminalsTerminateResponse {
 #[derive(Serialize, Deserialize, Debug, Clone, PartialEq, JsonSchema, TS)]
 #[serde(rename_all = "camelCase")]
 #[ts(export_to = "v2/")]
+/// DEPRECATED: `thread/rollback` will be removed soon.
 pub struct ThreadRollbackParams {
     pub thread_id: String,
     /// The number of turns to drop from the end of the thread. Must be >= 1.