v0.5.1

Added

• Cache: Support for synchronous functions in the @cached decorator. The decorated function becomes asynchronous and must be awaited by the caller, allowing cache reuse for both async and sync business logic.
• Template: Integrated cache support into the standard-3tier project template, including optional dependency, configuration, initialization in main.py, and README usage notes.
• Tests: Test cases for sync function support in the @cached decorator.

Changed

• Docs: Cache API docs clarify that @cached supports both async and sync functions; add usage examples and note that caller must always await.