phish-sentinel v1.0.0

• First release: offline phishing URL scoring with 23 rules (lookalike, homograph, brand impersonation, userinfo, IP host, risky TLD, shortener, free hosting, open redirect and more), a brand watchlist (--brand), trusted domains, and URL extraction from emails and text with refanging.
• Text, JSON, SARIF, Markdown and table output; allowlist with expiry; per-rule severity; --fail-on; composite GitHub Action.