refactor(doc-sync): use WIT bindings directly for demo

  Replace async hermes-ipfs library with direct WIT function calls (file_add, file_pin, pubsub_publish). Remove conditional compilation and async dependencies to simplify the 4-step
  workflow demo.

Author: cong-or

hermes/bin/src/runtime_extensions/hermes/http_gateway/config/endpoints.json

@@ -56,16 +56,6 @@
       ],
       "json_schema": null
     },
-    {
-      "subscription_id": "doc_sync_health",
-      "module_id": "doc_sync",
-      "methods": [
-        "GET"
-      ],
-      "path_regex": "^/api/doc-sync/health$",
-      "content_types": [],
-      "json_schema": null
-    },
     {
       "subscription_id": "doc_sync_post",
       "module_id": "doc_sync",
@@ -79,20 +69,6 @@
         "application/json"
       ],
       "json_schema": null
-    },
-    {
-      "subscription_id": "doc_sync_channel",
-      "module_id": "doc_sync",
-      "methods": [
-        "POST"
-      ],
-      "path_regex": "^/api/doc-sync/channel/.*/post$",
-      "content_types": [
-        "application/octet-stream",
-        "text/plain",
-        "application/json"
-      ],
-      "json_schema": null
     }
   ]
 }