`photo.exif()` returns `ExifTags`: every EXIF tag exifreader reads from the file, keyed by tag name, each with exifreader's `id`, `value`, `description` and `computed`. The embedded thumbnail's tags are under `Thumbnail`, without the thumbnail image. A file with no EXIF, or a video, gives `{}`.
The thirteen typed methods stay. Each picks its field from the tags `exif()` returns through `readPhotoExif`, which now takes the tags instead of the bytes. GPS latitude and longitude are worked out from their tags and reference tags, since exifreader's computed position is not among the tags.
Also closes #148.
Model: opus-5-5
`examples/download-albums.ts` logs in from `QUAK_EMAIL` and `QUAK_PASSWORD`, then walks every album from `await lib.fresh()`. For each photo it runs `photo.download()` to the photo's save path and writes `{savePath}.json`, which holds the photo's record and EXIF. For each album it writes `{dir}/albums/{collectionID}.json` with the album's name and its photos' save paths. A file is written only when its content changes, so a second run downloads and rewrites nothing.
The script opens the library with prefetching off, as `quak backup` does. The build type-checks `examples/`. The README says how to run it.
Model: opus-5-5
Co-authored-by: clawbot <sneak+clawbot@sneak.cloud>