Xevion 5fde7d249f feat: add PostHog telemetry with privacy-focused tracking ...

Integrate optional PostHog telemetry to track page views, RDAP queries,
user interactions, and errors while maintaining user privacy.

Key features:
- Type-safe event tracking with discriminated unions
- Automatic source map upload for production error tracking
- Privacy protections (query targets excluded from successful lookups)
- Do Not Track (DNT) header support
- Optional telemetry (disabled by default without environment variables)
- Error boundary with automatic error tracking
- Context-based telemetry integration throughout UI components

Environment variables required for telemetry:
- NEXT_PUBLIC_POSTHOG_KEY: PostHog project API key (client-side)
- NEXT_PUBLIC_POSTHOG_HOST: PostHog API endpoint (client-side)
- POSTHOG_PERSONAL_API_KEY: Source map upload key (server-side)

2025-10-23 18:00:24 -05:00

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