Add app/ dir to also also include annotations

packages/bookshop/.cdsrc.json

@@ -21,7 +21,8 @@
                 "options": {
                     "model": [
                         "db",
-                        "srv"
+                        "srv",
+                        "app"
                     ]
                 }
             },
@@ -63,4 +64,4 @@
             }
         }
     }
-}
+}