v1.0.6 — fix ffprobe error masking + trim end_sec optional + tests
Bug fixes:
- /v1/audio/info now surfaces real ffprobe stderr instead of
"unknown error" (was using -v quiet which muted everything).
- /v1/audio/trim end_sec optional; omitting trims to source end.
Test harness: fixed container names — audiolla-pytest (CPU) /
audiolla-pytest-cuda (CUDA) — pre-killed by exact name at session
start. Same image reused, no rebuilds between tests.
New regression test for the MP3 info path. Trim test updated for
the new optional-end_sec contract.
Smoke: 395/395 CPU integration tests.