diigo-cache: lint typechecks the program scripts

scripts/tsconfig.json gives scripts/ node's types (@types/node, a new
devDependency) and allows the .ts import specifiers node's type
stripping needs; the worker's tsconfig still keeps node's types out.
pnpm lint runs it.

Generated-by: Claude Opus 5.5

diigo-cache/package.json

@@ -5,11 +5,12 @@
 	"scripts": {
 		"dev": "wrangler dev -c wrangler.jsonc -c ../webapp/wrangler.jsonc",
 		"types": "wrangler types",
-		"lint": "wrangler types --check && tsc -p tsconfig.json && tsc -p tests/tsconfig.json",
+		"lint": "wrangler types --check && tsc -p tsconfig.json && tsc -p tests/tsconfig.json && tsc -p scripts/tsconfig.json",
 		"test": "vitest run"
 	},
 	"devDependencies": {
 		"@cloudflare/vitest-plugin": "1.3.6",
+		"@types/node": "^22",
 		"typescript": "^5.9.0",
 		"vitest": "4.1.11",
 		"wrangler": "^4.148.0"