Precompute app-server protocol exports (#36212)

## Why

Normal app-server protocol builds do not need the `ts-rs` and `schemars`
implementations used to generate schema exports.

## What changed

- Embed compressed stable and experimental TypeScript and JSON schema exports,
  and serve the existing export APIs from those artifacts.
- Use no-op schema derives in non-test builds while keeping the real generators
  available for fixture regeneration and tests.
- Move schema fixture regeneration behind a Python helper and update
  `just write-app-server-schema --experimental` to refresh the experimental
  embedded exports.

## Testing

- Verify embedded exports match freshly generated stable and experimental
  schemas.
- Verify export options and on-disk output remain compatible.

GitOrigin-RevId: e8536338b457e6eec34bdf29ec0684144bd13734

codex-rs/app-server-protocol/src/export.rs

@@ -1,8 +1,10 @@
 use crate::ClientNotification;
 use crate::ClientRequest;
+use crate::JsonSchema;
 use crate::ServerNotification;
 use crate::ServerNotificationEnvelope;
 use crate::ServerRequest;
+use crate::TS;
 use crate::experimental_api::experimental_fields;
 use crate::export_client_notification_schemas;
 use crate::export_client_param_schemas;
@@ -22,7 +24,6 @@ use anyhow::Context;
 use anyhow::Result;
 use anyhow::anyhow;
 use codex_protocol::protocol::RolloutLine;
-use schemars::JsonSchema;
 use schemars::schema_for;
 use serde::Serialize;
 use serde_json::Map;
@@ -38,7 +39,6 @@ use std::path::Path;
 use std::path::PathBuf;
 use std::process::Command;
 use std::thread;
-use ts_rs::TS;
 
 pub(crate) const GENERATED_TS_HEADER: &str = "// GENERATED CODE! DO NOT MODIFY BY HAND!\n\n";
 const IGNORED_DEFINITIONS: &[&str] = &["Option<()>"];
@@ -87,11 +87,6 @@ impl GeneratedSchema {
 }
 
 type JsonSchemaEmitter = fn(&Path) -> Result<GeneratedSchema>;
-pub fn generate_types(out_dir: &Path, prettier: Option<&Path>) -> Result<()> {
-    generate_ts(out_dir, prettier)?;
-    generate_json(out_dir)?;
-    Ok(())
-}
 
 #[derive(Clone, Copy, Debug)]
 pub struct GenerateTsOptions {
@@ -112,10 +107,6 @@ impl Default for GenerateTsOptions {
     }
 }
 
-pub fn generate_ts(out_dir: &Path, prettier: Option<&Path>) -> Result<()> {
-    generate_ts_with_options(out_dir, prettier, GenerateTsOptions::default())
-}
-
 pub fn generate_ts_with_options(
     out_dir: &Path,
     prettier: Option<&Path>,