docs: Remove detailPath query parameter from /sources endpoint and document concurrency support in README.

API.md

@@ -98,7 +98,6 @@ Get raw download links.
 *   **Method:** `GET`
 *   **Query Params:**
     *   `subjectId` (required)
-    *   `detailPath` (required)
     *   `season` (optional)
     *   `episode` (optional)
 

README.md

@@ -7,6 +7,7 @@ A robust Node.js API server for accessing MovieBox content, featuring advanced s
 -   **Session Management**: Automatic cookie persistence and User-Agent rotation to prevent IP bans.
 -   **Anti-Ban**: Intelligent retry logic with exponential backoff for 403/429 errors.
 -   **Request Logging**: Detailed logging of incoming requests and outgoing API calls for easy debugging.
+-   **Concurrency Support**: Per-request session isolation ensures stability under high load (no cross-user session pollution).
 -   **Unified Sources**: `/sources` endpoint that aggregates download and stream links with auto-fallback.
 -   **Health Check**: `/apicheck` endpoint for monitoring server status.
 -   **Startup Banner**: Professional ASCII art banner with server status information.