Scalable CRUD API with Validation, Page Navigation, Filtering Features, and Database Connectivity

Create and produce a completely functional RESTful CRUD (Create, Read, Update, Delete) API that can be integrated with PostgreSQL or MongoDB. For resource management, the API should have well-organized endpoints with distinct concerns (controllers, services, and models).

Make sure the implementation consists of:

• Strong input validation for every payload in the request
• Effective Page Navigation for listing endpoints (e.g., page size, page number)
• sophisticated filtering options (by fields, ranges, or keywords, for example)
• Standardized response formats and appropriate error handling
• Safe and efficient database searches
• Configuring a database connection using the environment

Additionally, adhere to best practices for maintainability, scalability, and code organization. Provide basic documentation and sample request/response formats for every endpoint.