CopyArtifactMiddleware middleware to sync the missing associations for the project.

HeadBlobMiddleware intercept the head blob request.

PatchBlobUploadMiddleware middleware to record the accepted blob size for stream blob upload.

PostInitiateBlobUploadMiddleware middleware to add blob to project after mount blob success.

PutBlobUploadMiddleware middleware is to update the blob status according to the different situation before the request passed into proxy(distribution).

PutManifestMiddleware middleware middleware is to update the manifest status according to the different situation before the request passed into proxy(distribution).