- Add more null safety
- Fix possible FilePathCache race condition
- Add MoveFilesToBooksDir progress reporting
- All metadata is now downloaded in parallel with other post-success tasks.
- Improve download resuming and file cleanup reliability
- The downloader creates temp files with a UUID filename and does not insert them into the FilePathCache. Created files only receive their final file names when they are moved into the Books folder. This is to prepare for a future plan re naming templates
LibraryCommands.GetCounts hits the file cache hard. The previous cache implementation was linear list, so finding an entry by ID was (n). When you consider that each book may have many files, the number of cache entries could grow to many multiples of the library size.
The new cache uses a dictionary with the ID as its key, and a CacheEntry list as its value.
