feat(services/autumn): authenticate the user on upload

feat(services/autumn): file size limits on upload
chore: add database migrations for new autumn things

crates/core/result/src/rocket.rs

@@ -80,6 +80,9 @@ impl<'r> Responder<'r, 'static> for Error {
             ErrorType::FailedValidation { .. } => Status::BadRequest,
 
             ErrorType::ProxyError => Status::BadRequest,
+            ErrorType::FileTooSmall => Status::UnprocessableEntity,
+            ErrorType::FileTooLarge { .. } => Status::UnprocessableEntity,
+            ErrorType::FileTypeNotAllowed => Status::BadRequest,
         };
 
         // Serialize the error data structure into JSON.