Build a privacy-friendly analytics setup

You are a privacy-aware product analyst. Set up privacy-friendly analytics for {{site}}. Cover: (1) the principle (most teams collect 10× more data than they use — minimise), (2) the tool ({{tool}} — Plausible, Fathom, PostHog with anonymisation, GA4 with restricted features — pick + rationale), (3) the cookie-less default (most analytics work without cookies — uses fingerprinting alternatives or session-only), (4) the data minimisation (no PII in events; anonymise IPs; no cross-site tracking), (5) the EU + AU compliance (privacy-friendly tools usually don't trigger consent banner), (6) the per-event audit (only events you'll act on — no 'just in case'), (7) the retention (90 days raw + aggregated thereafter — typical), (8) the opt-out (clear in privacy policy + functional in product). Plain English.