v0.2.0

Changelog

• 5d05836 Merge develop — Phase 1 core engine v0.2.0
• a9c6b2a Merge develop — docs hero and Phase 1 spec alignment
• 732a9e8 Merge develop — fix fmt-check on aggregate.go
• 0fb67b7 Merge develop — fix gocyclo on aggregateHits
• 2d64eba feat: Phase 1 UA/ref enrichment and hit payload docs (v0.2.0)
• 39bf695 feat: multi-driver store, flush loop, and k8s health probes
• 336f6b1 feat: visitor hash, hourly aggregations, and per-IP rate limiting
• bca08cb refactor(store): split aggregateHits to satisfy gocyclo limit
• 25e7c8a style(store): gofmt aggregate.go (trailing newline)