Bug: Canon MakerNote parser not registered in tiff.go

[rpuneet]

Problem

Canon parser was merged in PR #24 but is not being invoked because it's not registered in the MakerNote registry.

Location

internal/parser/tiff/tiff.go - NewParser function

Current Code

registry := makernote.NewRegistry()
registry.Register(sony.New())  // Only Sony registered

Fix Required

registry := makernote.NewRegistry()
registry.Register(sony.New())
registry.Register(canon.New())  // Add this - Canon must be last (fallback)

Priority

Critical - Feature is broken

Discovered

During build verification after PR merges.

[rpuneet]

Canon parser is registered in tiff.go - verified in main branch