SetJSON marshals the value to JSON and stores it in cache

TakeScreenshotAndSave takes a screenshot, saves it to disk, and returns the file path This is kept for backward compatibility if needed elsewhere

TestAnalyzeHandler_Validation tests the handler's validation without making real network requests.

TestHealthEndpoints verifies both health endpoints return 200 with status "ok".

TestIPCheckHandler tests ip/check validation.

TestMetricsEndpoint verifies the /metrics endpoint is reachable and returns text/plain.

TestPunycodeHandler tests punycode endpoint validation.

TestRootEndpoint verifies the root handler returns the service metadata.

TestStructureHandlers tests length and depth endpoint validation.

TestTLDHandlers tests trusted-tld and risky-tld validation.

TestURLShortenerHandler tests shortener endpoint validation.

URLLengthValidator returns a middleware that rejects requests where the "url" query parameter exceeds maxLen bytes, preventing DoS via oversized input

Validate returns true if the token has a valid signature and has not expired.

fetchRDAP queries RDAP and returns normalized RegistrationData. Deprecated: Use fetchRDAPWithContext instead.

Helper to update output fields with mutex lock (direct version)