Create AUTHORIZATION_DOCS.md

Update JwtUtils.java

Update SecurityConfig.java

fix: clean up code formatting and improve readability in TokenBlacklistService and ValidAge

fix: improve formatting and readability in learn.md and PatientServiceImplTests.java

fix: improve code formatting and prevent instantiation in IdGenerator

fix: clean up code formatting in AgeValidator, AuthTokenFilter, and ErrorResponse classes

feat: add caching for product retrieval and update security configuration for external API access

feat: enhance caching configuration and update SQL drop table order

fix: update SQL drop table order and correct FakeStoreApiClient base URL

feat: implement ExternalApiController and ExternalApiService for product retrieval

feat: add ExternalProductDTO and update FakeStoreApiClient for product retrieval

feat: add ExternalProductDTO and update FakeStoreApiClient for product retrieval

feat: add migration XML files and update WebClient configuration

feat: add ExternalApiController and FakeStoreApiClient for product retrieval