v0.1.52

Added

• 5dive agent config <name> set effort=<low|medium|high|xhigh|max> — parity with set model=. Claude-only reasoning-effort setter (writes effortLevel to the agent's settings.json, same key the telegram plugin's /effort writes), validated against the five levels, errors clearly for non-claude types, applied via the existing deferred restart. xhigh/max are Opus-tier (Sonnet caps at high).
• 5dive agent info now surfaces effort (model · effort <level> in text, effort field in --json).