Use streaming ZIP extraction

[hagenw]

Use streaming ZIP extraction from audeering/audbackend#279 to speed up downloading models (with a single worker).

Execution time to load 7289b57d-1.0.0 (4.2 GB).

Before	After
0:02:21.247691	0:01:20.056608

Summary by Sourcery

Streamline model archive retrieval by leveraging backend-level streaming extraction instead of downloading and unpacking ZIP files locally.

Enhancements:

• Replace local ZIP download and extraction with backend_interface.get_archive to support streaming extraction of model archives.

Build:

• Update audbackend dependency to a git-based stream-extract branch to enable streaming archive support.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Switches model archive handling to use audbackend’s streaming ZIP extraction API for performance, and temporarily pins audbackend to a Git branch that provides this functionality.

Sequence diagram for streaming ZIP extraction in get_archive

sequenceDiagram
    actor User
    participant AudmodelBackend as Audmodel_backend.get_archive
    participant BackendInterface as BackendInterface
    participant Storage as Remote_storage
    participant FS as Local_filesystem

    User->>AudmodelBackend: load_model(version, path)
    AudmodelBackend->>BackendInterface: enter backend context
    activate BackendInterface
    BackendInterface->>Storage: open_archive_stream(path, version)
    Storage-->>BackendInterface: ZIP_stream
    BackendInterface->>FS: get_archive(path, tmp_root, version, verbose)
    FS-->>BackendInterface: files_extracted_to_tmp_root
    deactivate BackendInterface
    AudmodelBackend->>FS: move tmp_root to final root
    FS-->>AudmodelBackend: root_ready
    AudmodelBackend-->>User: model_loaded

Loading

File-Level Changes

Change	Details	Files
Replace local download-then-extract flow with backend-provided streaming archive extraction to a temporary directory.	Remove explicit construction of a temporary ZIP path and separate get_file call. Call backend_interface.get_archive with the remote path, temporary root directory, version, and verbosity to both download and extract in one step. Drop the subsequent audeer.extract_archive call and its keep_archive handling, as extraction is now handled by the backend.	audmodel/core/backend.py
Update audbackend dependency to a Git-based reference that includes streaming extraction support.	Change audbackend dependency specifier from a version constraint (>=2.2.3) to an editable Git URL pointing to the stream-extract branch so the new get_archive behavior is available.	pyproject.toml

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.0%. Comparing base (bf39284) to head (cdbf00c).

Additional details and impacted files

Files with missing lines	Coverage Δ
audmodel/core/backend.py	100.0% <100.0%> (ø)

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