chore(telemetry): align attached-file reader to flattened project root path

vibn-frontend/app/api/chat/route.ts

@@ -638,7 +638,7 @@ export async function POST(request: Request) {
       try {
         const res = (await execInDevContainer({
           projectId: activeProject.id,
-          command: `cat "/workspace/${activeProject.slug}/${safePath}" 2>/dev/null || echo "[File not found]"`,
+          command: `cat "/workspace/${safePath}" 2>/dev/null || echo "[File not found]"`,
         })) as unknown as { exitCode: number; stdout: string };
         fileContextsBlock += `\nFile: \`${safePath}\`\n\`\`\`\n${res.stdout}\n\`\`\`\n`;
       } catch {