Implementa o MVP do Adaptador de Planilhas no Elo Pro.

O módulo usa a identidade Supabase, isola cada workspace e registra storage, TTL, runner e biblioteca XLSX como decisões ainda abertas.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app/api/spreadsheet-adapter/sources/validate/route.ts

@@ -0,0 +1,30 @@
+import { NextResponse } from "next/server";
+import { errorResponse, requireReady } from "../../_lib";
+import { addSource, rejectWorkspaceForgery } from "@/server/spreadsheet-adapter/service";
+
+export const runtime = "nodejs";
+export const dynamic = "force-dynamic";
+
+export async function POST(request: Request) {
+  try {
+    const { ctx, deps } = await requireReady();
+    const form = await request.formData();
+    await rejectWorkspaceForgery(deps, ctx, form.get("workspace_id"));
+    const file = form.get("file");
+    const jobId = String(form.get("jobId") ?? "");
+    if (!(file instanceof File) || !jobId) {
+      return NextResponse.json({ error: { code: "EMPTY_FILE", message: "Envie o arquivo e a operação." } }, { status: 400 });
+    }
+    const result = await addSource(
+      deps,
+      ctx,
+      jobId,
+      { filename: file.name, bytes: Buffer.from(await file.arrayBuffer()) },
+      form.get("sheet") ? String(form.get("sheet")) : null,
+      Number(form.get("headerRow") ?? 1),
+    );
+    return NextResponse.json(result, { status: result.httpStatus });
+  } catch (error) {
+    return errorResponse(error);
+  }
+}