Will Miao b4f9c224d3 fix(example-images): move multi→single-library consolidation to startup, eliminate per-request os.listdir() ...

Move reverse-migration logic from get_model_folder() (hot path, called on
every metadata/example-images request) to ExampleImagesMigration, where it
runs once at startup.  On network storage this was causing 22-38s delays
per LoRA card click.

Additionally optimize prune_stale_example_images() to read the directory
listing once instead of per image entry (O(N*M) → O(M)).  Also reorder
consolidation checks so regex filters run before filesystem stat calls.

2026-07-30 18:11:40 +08:00

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