Generate file UUIDs upfront in checkFileInMemory() rather than
deferring to Files.Create(). This ensures file_chunks and chunk_files
records have valid FileID values when constructed during file
processing, before the batch insert transaction.
Root cause: For new files, file.ID was empty when building the
fileChunks and chunkFiles slices. The ID was only generated later
in Files.Create(), but by then the slices already had empty FileID
values, causing FK constraint failures.
Also adds PROCESS.md documenting the snapshot creation lifecycle,
database transactions, and FK dependency ordering.
- Changed blob table to use ID (UUID) as primary key instead of hash
- Blob records are now created at packing start, enabling immediate chunk associations
- Implemented streaming chunking to process large files without memory exhaustion
- Fixed blob manifest generation to include all referenced blobs
- Updated all foreign key references from blob_hash to blob_id
- Added progress reporting and improved error handling
- Enforced encryption requirement for all blob packing
- Updated tests to use test encryption keys
- Added Cyrillic transliteration to README
