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>

tests/performance/rows.test.ts

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+import { describe, expect, it } from "vitest";
+import { parseCsvText } from "@/domain/spreadsheet-adapter/csv";
+import { gridFromRows } from "@/domain/spreadsheet-adapter/csv";
+import { transformRows } from "@/domain/spreadsheet-adapter/transform";
+import { buildCsv } from "@/infra/export/tabular";
+
+describe("capacidade", () => {
+  it("transforma 50.000 linhas úteis sem perder registros", () => {
+    const lines = ["Origem"];
+    for (let index = 0; index < 50_000; index += 1) lines.push(String(index));
+    const grid = gridFromRows(parseCsvText(lines.join("\n")), 1, ["CSV"], "CSV");
+    expect(grid.rows).toHaveLength(50_000);
+    const output = transformRows(["Destino"], grid.headers, grid.rows, [{ sourceColumn: "Origem", modelColumn: "Destino" }]);
+    expect(output).toHaveLength(50_000);
+    expect(output[49_999][0]).toBe("49999");
+    const csv = buildCsv(["Destino"], output.slice(0, 2));
+    expect(csv.toString("utf8")).toContain("0");
+  });
+});