Add GetUserDashboard endpoint routed through user service

[duaudriver]

I have implemented the User Dashboard endpoint following the existing microservice architecture.

Summary of changes:

• Added a new gRPC method GetUserDashboard to user.proto
• Implemented handler and service logic in the user-service
• Routed the request through the API gateway using the existing user service pattern
• The endpoint aggregates user data and returns dashboard metrics (total users, admin users, standard users)

Testing:

• Verified services run successfully with PostgreSQL and RabbitMQ
• Tested the endpoint locally using:
  GET /api/users/dashboard
• The endpoint returns a 200 response with the expected dashboard structure

Please let me know if any adjustments are required.

Thanks.

[s222530306]

@duaudriver, please resolve merge conflicts

[duaudriver]

Implemented database-backed dashboard APIs and completed Sprint 2 dashboard integration

Removed hard-coded dashboard overview data

Added Sequelize/PostgreSQL-backed dashboard aggregation queries

Implemented dashboard overview endpoint

Implemented dashboard charts endpoint

Implemented dashboard activity endpoint

Added gRPC support for dashboard chart and activity services

Updated protobuf definitions and gRPC interfaces

Added API Gateway routes and controllers for dashboard APIs

Added user-service handlers and service-layer logic

Configured Docker services and RabbitMQ environment fixes

Verified functionality through Docker and curl endpoint testing