fix(app-server): fix optional bool annotations (#24099)

`#[serde(default)]` wasn't sufficient for our generated TS types to
reflect that clients didn't have to set them. We also need
`skip_serializing_if = "std::ops::Not::not"`. This is already a rule in
our agents.md file.

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

@@ -162,13 +162,13 @@ pub struct ThreadStartParams {
     /// If true, opt into emitting raw Responses API items on the event stream.
     /// This is for internal use only (e.g. Codex Cloud).
     #[experimental("thread/start.experimentalRawEvents")]
-    #[serde(default)]
+    #[serde(default, skip_serializing_if = "std::ops::Not::not")]
     pub experimental_raw_events: bool,
     /// Deprecated and ignored by app-server. Kept only so older clients can
     /// continue sending the field while rollout persistence always uses the
     /// limited history policy.
     #[experimental("thread/start.persistFullHistory")]
-    #[serde(default)]
+    #[serde(default, skip_serializing_if = "std::ops::Not::not")]
     pub persist_extended_history: bool,
 }
 
@@ -401,7 +401,7 @@ pub struct ThreadResumeParams {
     /// continue sending the field while rollout persistence always uses the
     /// limited history policy.
     #[experimental("thread/resume.persistFullHistory")]
-    #[serde(default)]
+    #[serde(default, skip_serializing_if = "std::ops::Not::not")]
     pub persist_extended_history: bool,
 }
 
@@ -518,7 +518,7 @@ pub struct ThreadForkParams {
     /// continue sending the field while rollout persistence always uses the
     /// limited history policy.
     #[experimental("thread/fork.persistFullHistory")]
-    #[serde(default)]
+    #[serde(default, skip_serializing_if = "std::ops::Not::not")]
     pub persist_extended_history: bool,
 }
 
@@ -1132,7 +1132,7 @@ pub enum ThreadActiveFlag {
 pub struct ThreadReadParams {
     pub thread_id: String,
     /// When true, include turns and their items from rollout history.
-    #[serde(default)]
+    #[serde(default, skip_serializing_if = "std::ops::Not::not")]
     pub include_turns: bool,
 }