Forward apps MCP product SKU from Codex config (#22872)

This adds `apps_mcp_product_sku` as a toplevel config.toml key. We pass
the given value as a header when listing MCPs for the client, allowing
connectors to be filtered per product entry point.

---------

Co-authored-by: Codex <noreply@openai.com>

codex-rs/config/src/config_toml.rs

@@ -360,6 +360,9 @@ pub struct ConfigToml {
     /// Base URL for requests to ChatGPT (as opposed to the OpenAI API).
     pub chatgpt_base_url: Option<String>,
 
+    /// Optional product SKU forwarded on host-owned Codex Apps MCP requests.
+    pub apps_mcp_product_sku: Option<String>,
+
     /// Base URL override for the built-in `openai` model provider.
     pub openai_base_url: Option<String>,
 

codex-rs/config/src/loader/mod.rs

@@ -61,6 +61,7 @@ const DEFAULT_PROGRAM_DATA_DIR_WINDOWS: &str = r"C:\ProgramData";
 const PROJECT_LOCAL_CONFIG_DENYLIST: &[&str] = &[
     "openai_base_url",
     "chatgpt_base_url",
+    "apps_mcp_product_sku",
     "model_provider",
     "model_providers",
     "notify",