Refactor OpenViking Memory API and User Management

- Updated API authentication headers to use `X-API-Key` for both admin and user APIs.
- Modified the account creation process to directly create user-specific accounts without requiring an admin workspace.
- Enhanced user creation to return account-specific details, including `admin_user_id`.
- Introduced new endpoints for retrieving task status and user profiles, allowing for more flexible user data management.
- Updated search functionality to include additional parameters such as `level` and `score_threshold`.
- Improved the handling of user keys in the storage layer to associate them with specific accounts.
- Added tests to validate the new user account creation process and search functionalities, ensuring proper integration with the OpenViking service.
- Included new documentation to reflect changes in API usage and expected request/response formats.

skills/memory-system-api/references/api.md

@@ -147,7 +147,10 @@ curl -s -X POST <MEMORY_SYSTEM_BASE_URL>/memory-system/search \
     "session_id": "<SESSION_ID>",
     "query": "我喜欢喝什么咖啡？",
     "use_llm": false,
-    "limit": 10
+    "limit": 10,
+    "level": 2,
+    "score_threshold": 0.8,
+    "target_uri": "viking://user/memories"
   }'
 ```
 
@@ -162,11 +165,14 @@ curl -s -X POST <MEMORY_SYSTEM_BASE_URL>/memory-system/search \
     "session_id": "<SESSION_ID>",
     "query": "我的偏好是什么？",
     "use_llm": true,
-    "limit": 10
+    "limit": 10,
+    "level": 2,
+    "score_threshold": 0.8,
+    "target_uri": "viking://user/memories"
   }'
 ```
 
-Raw API search responses include merged `items` plus compact backend diagnostics. Fields named `vector` are stripped recursively before the API returns JSON. The API does not return EverOS `original_data` or full episode payloads inside `backends` anymore.
+Raw API search responses include merged `items` plus compact backend diagnostics. Fields named `vector` are stripped recursively before the API returns JSON. The API does not return EverOS `original_data` or full episode payloads inside `backends` anymore. OpenViking search uses `/api/v1/search/search`; `target_uri`, `level`, and `score_threshold` are optional request fields.
 
 The search response shape should now look more like:
 
@@ -219,9 +225,15 @@ Use the compact `text` fields for answering. Only inspect raw `backends` when de
 ## Profile
 
 ```bash
-curl -s "<MEMORY_SYSTEM_BASE_URL>/memory-system/users/<USER_ID>/profile?user_key=<USER_KEY>"
+curl -sS --get "<MEMORY_SYSTEM_BASE_URL>/memory-system/users/<USER_ID>/profile" \
+  --data-urlencode "user_key=<USER_KEY>" \
+  --data-urlencode "query=我想喝东西" \
+  --data-urlencode "limit=10" \
+  --data-urlencode "level=2"
 ```
 
+This combines EverOS profile with OpenViking memory recall. The OpenViking request uses `/api/v1/search/search` with `target_uri: viking://user/memories`, `limit`, and `level`.
+
 ## Response Interpretation
 
 Inspect backend status: