docs: complete housekeeping migration matrix

scripts/verify-housekeeping-matrix.ts

@@ -0,0 +1,18 @@
+import { discoverLegacyPages } from "../src/features/housekeeping/migration/discover-legacy-pages";
+import { HOUSEKEEPING_MIGRATION_MATRIX } from "../src/features/housekeeping/migration/matrix";
+import { validateMigrationEntries } from "../src/features/housekeeping/migration/validate-matrix";
+
+const discovered = discoverLegacyPages();
+const issues = validateMigrationEntries(
+	discovered,
+	HOUSEKEEPING_MIGRATION_MATRIX,
+);
+
+if (issues.length > 0) {
+	for (const issue of issues) console.error(issue);
+	process.exitCode = 1;
+} else {
+	console.log(
+		`Housekeeping migration matrix: ${HOUSEKEEPING_MIGRATION_MATRIX.length}/${discovered.length} valid`,
+	);
+}