Feature/integration mcnotify

Overview Initial setup and integration of the notification-preferences-service within the Darvest ecosystem. This PR establishes the core service logic, security configurations, and a comprehensive set of endpoints for notification management across all platforms.

Key Technical Changes

Maven & Environment: Configured pom.xml with Feign Client dependencies and setup application.yml/application-local.yml (Keycloak, REST timeouts, and service discovery).

Connectivity: Established microservice communication using ${MC_NOTIFY_URL:http://localhost:3009}.

Implemented Features (Postman Collection validated)

User Management: Endpoints for listing notifications, unread counts, and marketing preferences (Opt-in/Opt-out).

Notification Interactions: Added functionality to mark as read, favorite, archive, and logical deletion.

Notification Triggers: Integrated system events for:

KYC: Approved / Rejected status.

Wallet: Deposits, withdrawals, and insufficient balance alerts.

Support: Ticket replies.

Onboarding: Welcome messages and property updates.

Admin & Push: Implemented broadcast system (ROLE_ADMIN) and Web Push token registration.

Cross-Service Impact This work aligns with the API Gateway routing, KYC Service event publishers, and Frontend Notification Center integration.