dream: periodic memory consolidation

Changes made:

1. **MEMORY.md** — Replaced the single PCTuning.cz entry with a broader fact covering all three blocked Czech sites (PCTuning.cz, vtm.zive.cz, zive.cz) and the workaround (manual HTML paste). This merges the new conversation fact with the existing one.

2. **skills/bookmark/SKILL.md** — Added "Known limitations" section documenting: no edit/update command, soft-delete only, and Cloudflare-blocked sites requiring manual paste. This is operational detail that belongs in the skill, not MEMORY.md.

The other conversation facts were either already captured (Czech language preference in USER.md, bookmark skill commands in SKILL.md) or ephemeral (re-adding a specific bookmark — task state, not durable memory).

memory/MEMORY.md

@@ -11,7 +11,7 @@ This file stores important information that should persist across sessions.
 - Pi agent načítá všechny AGENTS.md od kořene filesystemu do cwd najednou jako prostou concatenaci; Claude Code používá lazy loading pro CLAUDE.md v podadresářích a podmíněná pravidla v `.claude/rules/*.md` s atributem `paths`
 - Zálohy: wood.hell → pivo.hell (rekurzivní)
 - Goal: interconnect remind, keep, note, and todo into a unified workflow
-- PCTuning.cz nelze fetchnout přes Jina extractor (vrací jen logo SVG) — pravděpodobně paywall nebo vyžaduje JS rendering
+- České weby blokující automated fetching (Cloudflare / JS rendering): PCTuning.cz, vtm.zive.cz, zive.cz — pro plný obsah je potřeba manuální paste HTML od uživatele
 
 ## Runtime / Deployment
 - Installed as a `uv` tool: package `nanobot-ai`, update via `uv tool upgrade nanobot-ai`