Fix issues on server start

server/helpers/custom-validators/activitypub/account.ts

server/helpers/custom-validators/activitypub/misc.ts

server/helpers/custom-validators/activitypub/videos.ts

server/helpers/custom-validators/video-channels.ts

server/helpers/custom-validators/videos.ts

server/initializers/constants.ts

server/initializers/installer.ts

server/lib/user.ts

server/lib/video-channel.ts

server/models/account/account.ts

server/models/account/user.ts

server/models/pod/pod.ts

server/models/video/video-channel.ts

server/models/video/video.ts