ChordFlask v0.9.25

Standalone and Debian reliability fixes

Bug Fixes

Restored standalone and Debian chordflask-analyze for core Chordino/QM
analysis using the bundled runtime, without a source checkout or development
virtual environment.
Fixed system FFmpeg selection in the frozen runtime and library-path
conflicts when launching external FFmpeg, including MP4 conversion.
Missing Vamp plugins now produce clearer installation, verification and
retry instructions appropriate to the installation type.
GUI analysis errors stay visible for the selected song and show the failure
details and retry instructions.

Added packaging, integration and regression tests for bundled CLI analysis,
plugin diagnostics, GUI failures and frozen FFmpeg conversion.
A Mint 22 / Python 3.12 DEB was practically verified on a separate Lubuntu
26.04.1 LTS x86_64 system: MP4 conversion, Chordino/QM analysis and
JSON/MIDI/MusicXML output succeeded with the normal CLI invocation. GUI
analysis succeeded after a full process restart.

System FFmpeg remains required. Vamp plugins are not bundled or installed
automatically; run the supplied plugin installer explicitly. Other optional
helpers still require their documented external runtimes or source setup.
Existing analyses remain displayable without optional generation runtimes.
The Lubuntu result covers one tested installation, not arbitrary Linux
distributions. An earlier intermittent GUI-worker tqdm._lock error has
no proven root cause and is not claimed as independently fixed.
Score remains Alpha / experimental, with the notation-quality limitations
described in the Score documentation.