fix(db): correct ambiguous data column error in plan generation query

vibn-frontend/app/[workspace]/project/[projectId]/(home)/plan/page.tsx

@@ -4,6 +4,7 @@ import React, { useState, useEffect, useCallback } from "react";
 import { useParams } from "next/navigation";
 import { Loader2, Target, BookOpen, Layers, GitBranch, Pencil, FileText, Check, Plus, ListTodo } from "lucide-react";
 import ReactMarkdown from "react-markdown";
+import remarkGfm from "remark-gfm";
 import useSWR from "swr";
 
 // Types mapping to our Postgres plan shape