Fix memory consolidation truncation: set max_tokens=16384

Consolidation was failing because max_tokens defaulted to 4096,
causing Haiku's response to be truncated mid-JSON (finish_reason=max_tokens).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

nanobot/agent/loop.py

@@ -426,6 +426,7 @@ Respond with ONLY valid JSON, no markdown fences."""
                 ],
                 model="claude-haiku-4-5",
                 thinking_budget=0,
+                max_tokens=16384,
             )
             text = (response.content or "").strip()
             if text.startswith("```"):