feat: Add Swagger documentation for admin and master API endpoints

- Added Swagger documentation for the following admin endpoints:
  - Create a new master tenant
  - Create a new provider
  - Register a new model
  - List all models
  - Update a model
  - Force sync snapshot
  - Ingest logs

- Added Swagger documentation for the master endpoint:
  - Issue a child key

- Updated go.mod and go.sum to include necessary dependencies for Swagger.

docker-compose.yml

@@ -52,6 +52,7 @@ services:
       EZ_REDIS_ADDR: ${EZ_REDIS_ADDR:-redis:6379}
       EZ_REDIS_PASSWORD: ${EZ_REDIS_PASSWORD}
       EZ_REDIS_DB: ${EZ_REDIS_DB:-0}
+      EZ_ADMIN_TOKEN: ${EZ_ADMIN_TOKEN:-admin123}
     depends_on:
       postgres:
         condition: service_healthy