Description

Schema & migration: Replaced @@index([streamId, createdAt]) with @@index([streamId, timestamp]) in backend/prisma/schema.prisma.
Added migration backend/prisma/migrations/20260630120000_add_stream_event_stream_id_timestamp_index/migration.sql:
Creates StreamEvent_streamId_timestamp_idx
Drops unused StreamEvent_streamId_createdAt_idx (with IF EXISTS, since it was only in schema drift and never migrated)

Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📚 Documentation update
• 🔧 Refactoring (no functional changes)
• ⚡ Performance improvement
• 🧪 Test addition or update

Related Issues

Closes #833
Closes #834
Closes #835
Closes #836

Changes Made

The listed controllers already match the new index access pattern:

getStreamEvents — where: { streamId } + orderBy: { timestamp }
getStream include — events: { orderBy: { timestamp: 'desc' } }
getUserEvents — orderBy: { timestamp: 'desc' }

Testing

Test Coverage

• Unit tests added/updated
• Integration tests added/updated
• Manual testing performed

Test Steps

All targeted tests pass:

stream.controller.test.ts — 10 passed
user.controller.test.ts — 11 passed
integration/streams.test.ts — 12 passed
npx prisma validate passes. Docker/Postgres is not available here, so EXPLAIN-based index verification was not run locally; the migration SQL follows the same pattern as prior index migrations in this repo.
When you have Postgres available, apply with:
cd backend && npx prisma migrate deploy

Migration Guide:

Added migration backend/prisma/migrations/20260630120000_add_stream_event_stream_id_timestamp_index/migration.sql:
Creates StreamEvent_streamId_timestamp_idx
Drops unused StreamEvent_streamId_createdAt_idx (with IF EXISTS, since it was only in schema drift and never migrated)

Checklist

• My code follows the project's style guidelines
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published
• I have checked for breaking changes and documented them if applicable

Additional Notes