v0.2.9

Fix schedule runner single-turn: tools never called in cron/schedule agent turns (#187)
Fix schedule runner ignores per-agent model override (#181)
Add web_fetch POST/PUT/PATCH/DELETE support with headers and body (#184)
Add ClawHub response caching to prevent 429 rate limiting (#191)
Fix Telegram 409 conflict on restart by calling deleteWebhook first (#156)
Fix config set writes invalid top-level keys that break deserialization (#183)
Make default_model hot-reloadable without restart, add catalog dropdowns (#203)
Fix Visual Builder SVG drag-drop rendering with manual createElementNS (#201)