Include schemas endpoints

[jeroenrinzema]

Include new endpoints for the users and events schemas.

[Copilot]

Pull request overview

This PR introduces new endpoints for retrieving schema information for users and events in the Lunogram platform. It adds two new GET endpoints that return structured schema data, enabling the frontend to understand the available data fields and their types for both user profiles and event tracking.

Key changes:

• Added ListUserSchemas endpoint to retrieve all user data schema paths
• Added ListEvents endpoint to retrieve events with their associated schema paths
• Implemented store layer methods to fetch schema data from the database

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
services/nexus/internal/store/users.go	Added UserSchema struct and ListUserSchemas method to query user schema paths
services/nexus/internal/store/events.go	Added Event struct and ListEvents method to query events with aggregated schema paths
services/nexus/internal/http/controllers/v1/management/users.go	Implemented ListUserSchemas controller handler with authentication and response mapping
services/nexus/internal/http/controllers/v1/management/events.go	Created new EventsController with ListEvents handler for events schema retrieval
services/nexus/internal/http/controllers/v1/management/users_test.go	Added comprehensive tests for ListUserSchemas endpoint covering success, empty, and unauthorized cases
services/nexus/internal/http/controllers/v1/management/events_test.go	Added comprehensive tests for ListEvents endpoint covering success, empty, and unauthorized cases
services/nexus/internal/http/controllers/v1/management/controller.go	Integrated EventsController into main controller struct
services/nexus/internal/http/controllers/v1/management/oapi/resources.yml	Defined OpenAPI specifications for both new endpoints with schemas
services/nexus/internal/http/controllers/v1/management/oapi/resources_gen.go	Generated Go code from OpenAPI spec including types, client methods, and server interfaces