quak helper fix-missing-thumbnails --file on an empty cache stops fetching collections once it finds every file (closes #223)

`helper fix-missing-thumbnails --file` used to wait for a refresh, which
on an empty cache fetched the files of every collection. It now finds the
named files through the new `freshFilesByID` in `src/cli-read.ts`, by the
rule `freshFile` follows. On an empty cache it reads the collection list,
then one collection's files at a time, and stores none of the collections
or file records it reads. It searches the most recently updated
collection first. So a file in several albums is still named after the
first of them that `Library.albums.list()` lists. `fixMissingThumbnails`
now takes the records the command found, and fetches each original
through `lib.originalOf()`.

Model: opus-5-5

test/cli/log.test.ts

@@ -234,9 +234,9 @@ describe("-q", () => {
         });
     });
 
-    // No album holds file 999, so fixing it fails. The refresh's progress and
-    // the list of failed files are left out. The line saying why the command
-    // failed is the fatal one, and it is printed.
+    // No album holds file 999, so fixing it fails. The summary from
+    // `--- Done ---` to the end of the `Failed files:` list is left out. The
+    // line saying why the command failed is the fatal one, and it is printed.
     it("prints only the line a failing command exits with", async () => {
         const fix = ["helper", "fix-missing-thumbnails", "--file", "999"];
         expect(await quak("-q", ...fix)).toEqual({