test: add test for storing, retrieving u64::MAX values in JSON

The test passes. We create a FilesystemEntry with a length field
containing u64::MAX, store that into a generation, and read it back.
This works. The entry is serialised into JSON for storing in SQLite,
and this proves we can handle any u64 value in an entry. serde_json
deals with it fine, and we don't need to worry about it.

Sponsored-by: author

0 files changed, 0 insertions, 0 deletions