Introducing DatabaseManager method to find the message items by the receiver (`toDeviceID` field)We need to fetch undelivered messages from the database by the receiver which is `toDeviceID` field in our case.
`findMessageItemsByReceiever` method was implemented for this purpose.
Related linear task: [[ https://linear.app/comm/issue/ENG-510/document-services-vscode-dev-environment | ENG-751 ]]