Example script: download every album's photos and metadata (closes #144)

`examples/download-albums.ts` logs in with `QUAK_EMAIL` and `QUAK_PASSWORD`,
opens the library, and for every album downloads each photo to its save path,
writes `{savePath}.json` with the photo's record (cache paths left out) and its
EXIF fields, and writes `albums/{collectionID}.json` with the album's save
paths. A JSON file is written only when its content changed, so a second run
downloads and rewrites nothing. `tsconfig.json` includes `examples/`, so the
build type-checks it. A test runs it twice against a stand-in account.

Model: opus-5-5

TODO.md

@@ -25,6 +25,12 @@ declares one.
 
 # Completed Steps
 
+- 2026-10-01: `examples/download-albums.ts` logs in, opens the library, and for
+  every album downloads each photo to its save path, writes the photo's record
+  and EXIF fields to a JSON file beside it, and writes the album's photos to
+  `albums/<collectionID>.json` (issue 144). The build compiles it to
+  `dist/examples/`; the README's "Examples" section says how to run it.
+
 - 2026-10-01: A `Photo` has one async method for each field of `exif()`, named
   and typed as in `PhotoExif`: `make()`, `model()`, `lensModel()`,
   `dateTimeOriginal()`, `offsetTimeOriginal()`, `exposureTime()`, `fNumber()`,