Enhance create_image_block to Dynamically Detect Image Type

[rajkstats]

• Use imghdr to detect the image type automatically (with a fallback to PNG if detection fails).
• This update improves flexibility by properly handling various image formats rather than hardcoding JPEG.

[jamesmurdza]

imghdr has to be imported, right?

[rajkstats]

you're right— imghdr must be explicitly imported, while imghdr is part of the standard library we don't need to add in poetry dependencies

• In our earlier implementation, although imghdr wasn't imported, we were passing in a base64‑encoded string instead of the raw image bytes. Because of that, imghdr.what() was not actually able to detect the image type and ended up defaulting to "png"
• Fixed that by passing the raw bytes to imghdr.what(), which should allow it to properly detect the image type
• Comment out debug prints used for logging the detected image type to ensure its detecting image type properly (tested for both jpg and png in tests)