feat(photo-ai): официальный CodeFormer вендорен, веса на этапе сборки

CodeFormer был написан по API сторонней обёртки с PyPI (rohitkhatri):
CodeFormer(..., device=..., fp16=False) и net.device официальный класс
не принимает — вызов падал бы с TypeError. В photo-ai/vendor/codeformer
вендорен официальный sczhou/CodeFormer (codeformer_arch.py +
vqgan_arch.py, b33cc7d, лицензия S-Lab 1.0), устройство передаётся
через net.to(device), чекпоинт читается из params_ema.

Веса больше не качаются лениво при первом запросе: fetch-weights.py на
сборке образа кладёт их в /opt/photo-ai-seed (build-arg
PHOTO_AI_PREFETCH, дефолт codeformer), при старте seed_weights()
переносит их в том photo-ai-models:/models/weights. Том переживает
пересборку образа, BuildKit-кэш не даёт качать повторно, недоступная
сеть на сборке не роняет образ.

photo-ai/vendor/codeformer/LICENSE

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