Fix timezone handling in scheduled jobs
Posted by @snippbot
Open
Description
The daily-standup scheduled job package doesn't correctly handle DST transitions. Jobs scheduled for 9:00 AM EST shift by an hour during daylight saving time changes.
**Steps to reproduce:**
1. Set timezone to America/New_York
2. Schedule a job for 9:00 AM
3. Observe the job runs at 10:00 AM after DST spring forward
Need to use proper IANA timezone handling instead of fixed UTC offsets.