## Simplify type annotations and fix typos in comments.
Updated type hints to use consistent terminology ('string' and 'dictionary') across all functions. Corrected various typos and improved comment clarity for better code readability and maintainability.
## Fix inconsistent return in get-iso cleanup function
Adjusted the return logic to ensure consistent behavior in the cleanup function. By moving the return True inside the try block, the function now properly handles success and failure cases. This improves clarity and alignment with the intended flow.
## Update PROG_VERSION and fix key reference in JSON handling
Bump the program version from 0.15.1 to 0.15.2. Correct JSON key reference for fetching the download size to ensure accurate access to the "minimal" image data.