feat(models): rename ModelPublicUser to ModelPublicUsers and update references

* Update user-related models to use plural naming for consistency
* Add relationships to ModelPublicUsers in related models
* Adjust database migration and schema to reflect changes
* Remove deprecated ModelPublicUser

pkg/models/sql_public_whatsapp_account.go

@@ -22,6 +22,7 @@ type ModelPublicWhatsappAccount struct {
 	Status          resolvespec_common.SqlString    `bun:"status,type:varchar(50),default:'disconnected',notnull," json:"status"` // connected
 	UpdatedAt       resolvespec_common.SqlTimeStamp `bun:"updated_at,type:timestamp,default:now(),notnull," json:"updated_at"`
 	UserID          resolvespec_common.SqlString    `bun:"user_id,type:varchar(36),notnull," json:"user_id"`
+	RelUserID       *ModelPublicUsers               `bun:"rel:has-one,join:user_id=id" json:"reluserid,omitempty"` // Has one ModelPublicUsers
 }
 
 // TableName returns the table name for ModelPublicWhatsappAccount