replace the custom Graphene mutation `RetrieveExactProducts` with a unified DRF implementation using `inline_serializer`. Updated GraphQL schema to resolve `retrieve_exact_products` query using a standardized approach.
This change improves consistency across DRF and GraphQL APIs, reduces duplicate logic, and centralizes request validations.
Added the `RetrieveExactProducts` query to the schema to enable fetching specific product details. This addition enhances the granularity of product data retrieval in the GraphQL API.
Fixes: 1) Add `# ty: ignore` comments to suppress type errors in multiple files; 2) Correct method argument annotations and definitions to align with type hints; 3) Fix cases of invalid or missing imports and unresolved attributes;
Extra: Refactor method definitions to use tuple-based method declarations; replace custom type aliases with `Any`; improve caching utility and error handling logic in utility scripts.
