chore: run Crisp triage every 3 hours instead of every 5

[lihsaa591]

Summary

• Crisp triage skipping is currently at ~5-8 clean runs in a row (nothing to investigate) at the every-5-hours cadence. Tightening to every 3 hours to catch resolved conversations sooner without going back to hourly.

Test plan

• Manually dispatch Crisp triage on master to confirm the pipeline still runs cleanly end-to-end
• After merge, confirm the next scheduled run fires ~3h after the previous one

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