## Summary
Fixes slow getRoles requests caused by loading several one-to-many role
relations in a single TypeORM query.
The previous query produced a Cartesian product across role targets,
permission flags, object permissions, and field permissions. In
production, a workspace with 9 roles expanded into more than 32,000
database rows before TypeORM hydration.
This change:
- Reads roles and their related permissions from the existing flat-map
caches.
- Hydrates relations using the same findManyWithRelationsFromCache
pattern as ViewService.
- Removes the expensive joined query from the getRoles path.
- Preserves the existing GraphQL response shape.
## Performance
### Before:
9 roles
32,257 SQL result rows
Approximately 10 seconds observed request latency
### After:
No Cartesian SQL query
Cache-backed lookups and in-memory relation hydration
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Weiko
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