exif(): read HEIF/HEIC originals with exifreader (closes #145)

photo.exif() and backup-metadata --exif read EXIF with exifreader,
which reads JPEG, HEIC/HEIF, AVIF, PNG and WebP, so a HEIC original or
a live photo's HEIC image gets its EXIF. exifreader replaces
exif-reader and the hand-written JPEG segment scan. PhotoExif is
unchanged. The exif field of backup-metadata --exif is now
exifreader's tag output, and exifRaw holds the whole EXIF block it
could not read. Tests use a real 933-byte HEIC fixture, test/exif.heic,
whose recipe is in test/exif-heic.ts.

Model: opus-5-5

test/cli/commands.test.ts

@@ -56,6 +56,7 @@ import type { ContentSource } from "../../src/library/content.js";
 import type { Collection, EnteFile } from "../../src/model/types.js";
 import { init, toBase64 } from "../../src/crypto/index.js";
 import { defaultCacheDirectory } from "../../src/library/index.js";
+import { HEIC_WITH_EXIF } from "../exif-heic.js";
 import {
     asLivePhoto,
     cdnSource,
@@ -653,6 +654,31 @@ describe("a live photo", () => {
             height: 4,
         });
     });
+
+    it("backup-metadata --exif records the EXIF of a HEIC image", async () => {
+        const dir = join(root, "dump");
+
+        expect(
+            await backupMetadataCommand(
+                context(await livePhotoClient(HEIC_WITH_EXIF)),
+                dir,
+                { exif: true },
+            ),
+        ).toBe(0);
+
+        const record = JSON.parse(
+            readFileSync(
+                join(dir, "collections", "1-Vacation", "300.json"),
+                "utf-8",
+            ),
+        );
+        expect(record.imageMetadata.exifError).toBeUndefined();
+        expect(record.imageMetadata.exif).toMatchObject({
+            Make: { value: ["Canon"] },
+            Model: { value: ["EOS R5"] },
+            DateTimeOriginal: { value: ["2021:07:15 14:30:00"] },
+        });
+    });
 });
 
 describe("backup", () => {