quak get and get-thumb on an empty cache stop fetching collections once they find the file (closes #222)

`quak get` and `quak get-thumb` used to wait for a refresh, which on an
empty cache fetched the files of every collection. Now, on an empty
cache, `freshFile` reads the collection list, then one collection's
files at a time, and stops at the first that holds the file. That search
stores nothing. Once the cache holds the account's collections,
`freshFile` refreshes as before and looks the file up in the cache. The
commands fetch the content through the new `Library.originalOf()` and
`Library.thumbnailOf()`, which take the file record itself, since the
store may not hold it.

On an empty cache they no longer print a refresh's progress lines. The
`-q` test that relied on `get` refreshing now runs
`helper fix-missing-thumbnails`.

Model: opus-5-5

src/library/index.ts

@@ -66,6 +66,8 @@ import {
     ContentCache,
     savePath,
     storedAtSavePath,
+    type ContentOptions,
+    type ContentResult,
     type ContentSource,
     type ThumbnailsAPI,
     type EnsureOptions,
@@ -644,6 +646,36 @@ export class Library {
         return [...byID.values()];
     }
 
+    // The original of `file`, fetched and cached as `Photo.original()` does.
+    // `file` is used as given, so the store need not hold it. On an empty
+    // cache, `quak get` passes a file that `freshFiles()` returned.
+    async originalOf(
+        file: EnteFile,
+        opts?: ContentOptions,
+    ): Promise<ContentResult> {
+        if (!this.cache) {
+            throw new Error(
+                "originalOf requires a library opened with a content cache",
+            );
+        }
+        return this.cache.originalOf(file, opts);
+    }
+
+    // The thumbnail of `file`, fetched and cached as `Photo.thumbnail()` does.
+    // `file` is used as given, so the store need not hold it. On an empty
+    // cache, `quak get-thumb` passes a file that `freshFiles()` returned.
+    async thumbnailOf(
+        file: EnteFile,
+        opts?: ContentOptions,
+    ): Promise<ContentResult> {
+        if (!this.cache) {
+            throw new Error(
+                "thumbnailOf requires a library opened with a content cache",
+            );
+        }
+        return this.cache.thumbnailOf(file, opts);
+    }
+
     // Back up every in-scope file to `opts.downloadDirectory`, or else the
     // library's, each original at its save path, with a durable failure
     // ledger (issue #51). Takes the lock in that directory first, unless the