oumike. Closes#315 (pisti87's request).
Two conflicts, both resolved by keeping BOTH sides rather than choosing:
- sdRuntimeLifecycleBusy() gained an audio-playback source here and a web
reader source in #317. They are independent consumers of the same card and
both have to gate the mount lifecycle. The reader's self-exclusion is kept:
it calls this from its own task while holding the card and would otherwise
deadlock against itself.
- The Lua harness caps table needed sd_list from #312 as well as the audio
flags, and the test order needed the wardrive suite from #324 as well as
audio_api.
Built on all eight S3 envs and both ESP32-P4 targets.