- Add profileRow struct with ICCID/EID/IMSI/MCC/MNC/ProfileType/State/TenantID/ActivationCode/CreatedAt/UpdatedAt fields mapped to esim_profiles table with indexes on EID/IMSI/State/TenantID
- Add NewPostgresProfileStore with DSN validation, GORM connection setup with Warn logging, and AutoMigrate for esim_profiles schema
- Add Create/Get/List/UpdateState/Delete methods implementing ProfileRepository interface with