Merge PR #48: feat: add Xiaohongshu source + Reddit public fallback

- Xiaohongshu search via local MCP service (opt-in, zero impact if service not running)
- Reddit public JSON fallback (works with zero API keys)
- Reddit priority: ScrapeCreators -> OpenAI -> public fallback
- Updated env.py: Reddit always available via public fallback

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

vendor/package/dist/lib/paginate-cursor.d.ts

@@ -0,0 +1,27 @@
+export type CursorPage<T> = {
+    success: true;
+    items: T[];
+    cursor?: string;
+} | {
+    success: false;
+    error: string;
+};
+export type CursorPaginationResult<T> = {
+    success: true;
+    items: T[];
+    nextCursor?: string;
+} | {
+    success: false;
+    error: string;
+    items?: T[];
+    nextCursor?: string;
+};
+export declare function paginateCursor<T>(opts: {
+    cursor?: string;
+    maxPages?: number;
+    pageDelayMs?: number;
+    sleep: (ms: number) => Promise<void>;
+    getKey: (item: T) => string;
+    fetchPage: (cursor?: string) => Promise<CursorPage<T>>;
+}): Promise<CursorPaginationResult<T>>;
+//# sourceMappingURL=paginate-cursor.d.ts.map