Fix/72 remove duration minutes

[maxiDeee]

Closes #72

Overview

Removed duration_minutes column from the coaching_sessions table to establish a single source of truth. Session duration now comes directly from the related service record instead of being duplicated in the coaching_sessions table.

Changes made:

• Removed durationMinutes field from the coachingSessions schema definition
• Updated submitAvailabilities action to no longer handle duration (implicitly retrieved from service)

Testing

• Verified submitAvailabilities creates coaching sessions without duration_minutes field
• Confirmed schema reflects the column removal

Screenshots / Screencasts

N/A - Database schema change only

Checklist

• Code is neat, readable, and works
• Code is commented where appropriate and well-documented
• Commit messages follow our guidelines
• Issue number is linked
• Branch is linked
• Reviewers are assigned (one of your tech leads)

Notes

This is a breaking change. Any code accessing coachingSessions.durationMinutes will need to fetch the duration from the related services record instead.

[Berny-ft]

Not 100% sure, but I don't think the migration file is needed since the schema is the same for everyone on Supabase after the migration.

[RenaudBernier]

The migration is not needed, we use schema.ts as our single source of truth and push changes with db:push

[maxiDeee]

Changes made and pushed