[Feature] Resumable chunked uploads for large photos and videos

I have searched the existing feature requests, both open and closed, to make sure this is not a duplicate request. • Yes The feature Feature description Implement resumable chunked uploads for web and mobile clients. Instead of uploading an entire file as a single HTTP request, files would be split into smaller chunks that are uploaded independently and reassembled server-side. Problem Many users host Immich behind reverse proxies or gateways that impose upload size limits. Examples include: • Cloudflare Proxy / Tunnel (100 MB limit on free plans) • Mobile networks with unstable connections • Slow internet links • Reverse proxies with request size restrictions Today a large video upload can fail completely because the entire file must be transferred as a single request. Benefits • Works through Cloudflare and similar services • Uploads can resume after interruption • Better experience on mobile…