- Add GET /api/v1/subscribers endpoint with pagination and filtering parameters
- Add POST /api/v1/subscribers endpoint for subscriber creation
- Add GET /api/v1/subscribers/{id} and GET /api/v1/subscribers/imsi/{imsi} endpoints
- Add PUT /api/v1/subscribers/{id} endpoint for subscriber updates
- Add POST /api/v1/subscribers/{id}/suspend and /api/v1/subscribers/{id}/terminate endpoints
- Add Swagger definitions
- 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/