Add photo downloads close #28

[iamprovidence]

Here is an overview of what got changed by this pull request:

Issues
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- Added 3

Complexity increasing per file
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- src/backend/Shared/ApiResponse/ApiResponse/ActionResults/ZipResult/Zipper.cs  2
- src/backend/Shared/ApiResponse/ApiResponse/ActionResults/NotificationResult/NotificationActionResultBuilder.cs  1
- src/backend/Shared/ApiResponse/ApiResponse/ActionResults/NotificationResult/NotificationResponse.cs  1
- src/backend/Aggregator/Aggregator/Requests/Albums/DownloadAlbum.cs  1
- src/backend/Shared/ApiResponse/ApiResponse/ActionResults/ZipResult/ZipActionResult.cs  1
- src/backend/Shared/ApiResponse/ApiResponse/ActionResults/ControllerExtensions.cs  1
- src/backend/Aggregator/Domains/DataTransferObjects/Albums/PhotoAlbumDTO.cs  1
- src/backend/Shared/ApiResponse/ApiResponse/ActionResults/NotificationResult/NotificationActionResult.cs  1
- src/backend/Shared/ApiResponse/ApiResponse/ActionResults/ZipResult/FileItem.cs  1

Clones removed
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+ src/backend/PhotoAPI/DataAccess/Implementations/ElasticService.cs  -2

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