refactor: move asset stacks to their own entity (#6353)

* feat: auto-stack burst photos

* feat: move stacks to asset stack entity

* chore: pin node version with volta in server

* chore: update e2e cases

* chore: cleanup

* feat: migrate existing stacks

---------

Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>

server/src/domain/metadata/metadata.service.spec.ts

@@ -499,6 +499,7 @@ describe(MetadataService.name, () => {
       expect(assetMock.upsertExif).toHaveBeenCalledWith({
         assetId: assetStub.image.id,
         bitsPerSample: expect.any(Number),
+        autoStackId: null,
         colorspace: tags.ColorSpace,
         dateTimeOriginal: new Date('1970-01-01'),
         description: tags.ImageDescription,

server/src/domain/metadata/metadata.service.ts

@@ -499,6 +499,7 @@ export class MetadataService {
       latitude: validate(tags.GPSLatitude),
       lensModel: tags.LensModel ?? null,
       livePhotoCID: (tags.ContentIdentifier || tags.MediaGroupUUID) ?? null,
+      autoStackId: this.getAutoStackId(tags),
       longitude: validate(tags.GPSLongitude),
       make: tags.Make ?? null,
       model: tags.Model ?? null,
@@ -518,6 +519,13 @@ export class MetadataService {
     return { exifData, tags };
   }
 
+  private getAutoStackId(tags: ImmichTags | null): string | null {
+    if (!tags) {
+      return null;
+    }
+    return tags.BurstID ?? tags.BurstUUID ?? tags.CameraBurstID ?? tags.MediaUniqueID ?? null;
+  }
+
   private getDateTimeOriginal(tags: ImmichTags | Tags | null) {
     if (!tags) {
       return null;