Record the successful request separately from the preferred quality and the
returned format. Preserve explicit fallback limits across playback and
prefetch, retain provenance when spilling to disk, and read old sidecars
conservatively without inventing acquisition history.
Cover available CD/96 kHz masters, fallback and authentication boundaries,
file identity and sidecar versions. The regression fails with the previous
predicate; 299 core tests pass. Playback smoke confirms CD-quality reuse
from disk after acquisition at the maximum requested tier.
cx
vicrodh
180f96d378