feat(import): harden workbook parser boundaries

packages/db/src/generate-excel.ts

@@ -2,14 +2,18 @@
  * Generate samples/CapaKrakenExamples.xlsx from the live database.
  *
  * Run from repo root:
- *   DATABASE_URL=postgresql://capakraken:capakraken_dev@localhost:5433/capakraken \
- *     pnpm --filter @capakraken/db tsx src/generate-excel.ts
+ *   pnpm --filter @capakraken/db db:excel
  */
 
 import { PrismaClient } from "@prisma/client";
 import ExcelJS from "exceljs";
 import path from "path";
 import { fileURLToPath } from "url";
+import { loadWorkspaceEnv } from "./load-workspace-env.js";
+import { assertCapaKrakenDbTarget } from "./safe-destructive-env.js";
+
+loadWorkspaceEnv();
+assertCapaKrakenDbTarget("db:excel");
 
 const prisma = new PrismaClient();
 const __dirname = path.dirname(fileURLToPath(import.meta.url));