- Add Subscriber model with IMSI/MSISDN/email/status/plan_id/profile_status fields and validation examples
- Add Service model with name/namespace/replicas/ready_replicas/available_replicas/creation_timestamp fields
- Add Deployment model with service/version/status/started_at/completed_at/metadata fields and status enum
- Add Plugin model with name/version/author/description/enabled/config fields
- Add Automation model with name/description/trigger/
