v0.3.0.23 — Fragment cache and large-topic pagination

[0.3.0.23] — 2026-07-10

Added

• Fragment cache — guest HTML fragments for home board panels and board topic lists (storage/cache/fragments/); same tag invalidation as page cache.
• Large-topic pagination — cursor-based post chunks above forum.topic_pagination_threshold (default 50); GET /topic/{id}/posts?after= load-more; ?latest=1 jump to tail.
• SQLite scale guide — operator limits and migration notes in docs/PERFORMANCE.md.
• CDN guide — Cloudflare cache rules in docs/CDN.md.