Decode ENCODING=b payloads for PHOTO, LOGO, SOUND, and KEY when parsing
so serializing a parsed card does not base64-encode already encoded wire
data a second time. Add regression coverage for both inline binary and
VALUE=uri round-trips.
AI-Assisted: yes
AI-Tool: OpenAI Codex /gpt-5.4 xhigh
Jonathan Bernard
35377f5a25
