Migrate session segments

[SpennyNDaJets]

Summary

Migrate the session segments into the new table for the new search experience

Setup
https://www.loom.com/share/05121714ea544dfab7e7567ed074ddff

Confirmation
https://www.loom.com/share/2eb271076a1e48ad8255e8c2a97a5e35

How did you test this change?

1. Create a session segment on the old UI
2. Run the task in dry run mode doppler run -- go run backend/scripts/migrate-session-segments/main.go

• Segment not updated
• Segment params look correct

3. Run the task in confirm mode doppler run -- go run backend/scripts/migrate-session-segments/main.go -confirm=true

• Segment updated
• Segment params look correct
• Able to load segment in new UI with same results

Are there any deployment considerations?

Run shortly before deploying #8328

Does this work require review from our design team?

N/A

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[Vadman97]

nice, looks reasonable