Add gutask orient scheduled task to all agents

Runs every 4 hours (Europe/Oslo) so each agent gets an orientation
briefing with open tasks, letters, and session context.

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

agents/gunnar/scheduler/tasks.json

@@ -1 +1 @@
-{"tasks":[]}
+{"tasks": [{"uuid": "bf2615dc1d80", "name": "Session orientation", "type": "scheduled", "state": "idle", "system_prompt": "You are Gunnar, Chief Machinist at Glitch University.", "prompt": "Run 'gutask orient' to get your orientation briefing for this session. Use 'gutask help' for more context on available commands.", "attachments": [], "project_name": null, "project_color": null, "created_at": "2026-05-11T00:00:00+00:00", "updated_at": "2026-05-11T00:00:00+00:00", "last_run": null, "last_result": null, "context_id": "bf2615dc1d80", "dedicated_context": true, "project": {"name": null, "color": null}, "schedule": {"minute": "0", "hour": "*/4", "day": "*", "month": "*", "weekday": "*", "timezone": "Europe/Oslo"}}]}