feat(grid-agent): add chat and IM interactions (#123)

crates/metacrate-grid-agent/tests/dependency_policy.rs

@@ -46,7 +46,7 @@ fn runtime_source_has_no_subprocess_or_native_abi_escape_hatch() {
     let mut files = Vec::with_capacity(16);
     collect_rust_files(&source, &mut files);
     assert!(
-        files.len() <= 14,
+        files.len() <= 16,
         "source-file count needs a reviewed bound update"
     );
     for path in files {
@@ -87,7 +87,7 @@ fn world_backend_requires_the_opaque_policy_authorization() {
 }
 
 #[test]
-fn live_session_adapter_reuses_only_the_native_network_manager_lifecycle() {
+fn live_session_adapter_reuses_native_lifecycle_and_messaging_managers() {
     let root = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
     let backend = fs::read_to_string(root.join("src/backend.rs")).expect("backend source");
     for required in [
@@ -96,6 +96,10 @@ fn live_session_adapter_reuses_only_the_native_network_manager_lifecycle() {
         ".native_subscribe_disconnected(",
         ".native_subscribe_event_queue_running(",
         ".native_logout_async(",
+        ".subscribe_chat_from_simulator(",
+        ".subscribe_im(",
+        ".chat(",
+        ".instant_message_with_uuid_string(",
     ] {
         assert!(
             backend.contains(required),