feature/add-stock-product

[andres15alvarez]

This pull request introduces several updates to improve the functionality, maintainability, and clarity of the codebase. Key changes include adding the @Expose decorator to DTOs for better serialization, introducing a new getProducts method in the ProductsService with enhanced filtering capabilities, and implementing a virtual column for stock calculation in the ProductPresentation entity. Additionally, some dependencies were updated, and unused repositories were removed.

Enhancements to DTOs:

• Added the @Expose decorator to properties in CategoryDTO, ManufacturerDTO, and ProductDTO to enable controlled serialization. The @Type decorator was also introduced in ProductDTO for nested object transformation. ([[1]](https://github.com/PharmaTechVe/api/pull/83/files#diff-9bf124d4c46627b8d2c1d39974abd76ef5c0913dc4c3f414c204e343f243f2e9R2-R19), [[2]](https://github.com/PharmaTechVe/api/pull/83/files#diff-e12a4d8a96c805cdae4b3fd234088af73b59256488ba93544886c5de4f1d1c5eR2-R14), [[3]](https://github.com/PharmaTechVe/api/pull/83/files#diff-f15b7608e25d980cbe574edaa3ee0e2fb62816b80c6ac2acfeaff58f02d8d41dR29-R78))

Improvements to ProductsService:

• Added a new getProducts method with advanced filtering options (e.g., by category, manufacturer, branch, and price range). This method is more flexible and replaces the older version, which has been marked as deprecated. ([[1]](https://github.com/PharmaTechVe/api/pull/83/files#diff-96a20d758e030b096d5569de349503fa568238e0ab514be78826ed9c9f445625R122-R215), [[2]](https://github.com/PharmaTechVe/api/pull/83/files#diff-96a20d758e030b096d5569de349503fa568238e0ab514be78826ed9c9f445625L59-R49))
• Removed unused repository injections (e.g., Product, Manufacturer, Category, etc.), simplifying the service's dependency list. ([src/products/products.service.tsL3-L30](https://github.com/PharmaTechVe/api/pull/83/files#diff-96a20d758e030b096d5569de349503fa568238e0ab514be78826ed9c9f445625L3-L30))

Entity Enhancements:

• Introduced a @VirtualColumn in the ProductPresentation entity to calculate stock dynamically based on inventory data. ([src/products/entities/product-presentation.entity.tsR46-R52](https://github.com/PharmaTechVe/api/pull/83/files#diff-88948ad8709ca59cb3ca1f35cd0335a91d13d4677f55b74c13a8c33516e5531aR46-R52))

Dependency Updates:

• Updated the typeorm dependency from version 0.3.20 to 0.3.22 in package.json. ([package.jsonL46-R46](https://github.com/PharmaTechVe/api/pull/83/files#diff-7ae45ad102eab3b6d7e7896acd08c427a9b25b346470d7bc6507b6481575d519L46-R46))

Controller Serialization:

• Updated the ProductsController to use plainToInstance for transforming and serializing the response data into ProductPresentationDTO with explicit and implicit conversion options. ([src/products/products.controller.tsL127-R134](https://github.com/PharmaTechVe/api/pull/83/files#diff-057c369854000322460bf5f5a7a7271d71e83e676a2f33cf2cd50a9923f938f3L127-R134))