Enhanced Image Compression Format Handling

What: Image compression now explicitly passes the original file's media type to prevent format detection failures

Details:

• Caller (Fw5() at line 315499) now extracts file extension and constructs media type string before compression
• Function kiQ() at line 156042 (renamed from TiQ) accepts new media type parameter and forwards to compression handler
• Prevents incorrect format handling when Sharp's automatic detection fails (e.g., PNG images incorrectly treated as JPEG)
• No user-facing API changes - internal reliability improvement
• Evidence: Function signature changed from TiQ(A, Q) at line 156040 in v2.0.45 to kiQ(A, Q, B) at line 156042 in v2.0.46