- Created TestDatabaseIsolation in internal/rpc/isolation_test.go
- Single-issue test verifies test DB isolation works correctly
- Prevents repeat of stress test pollution incident
- Test passes cleanly without polluting production database
Closes bd-44
Amp-Thread-ID: https://ampcode.com/threads/T-b3e81b42-2498-45b5-9c8b-beb27f7e9550
Co-authored-by: Amp <amp@ampcode.com>
