Can you post the screenshot of the groups that everyone is member of from useradmin? And a screenshot of the inbox for the user?

AEM inbox shows notifications that are assigned to a user or to groups that the user is part of. Unless you are an admin, you will not see all the notifications. If this is not the behavior for you, please check the permissions for the user.

You have to add foundation-project as a sub package in the content package maven plugin configuration in the pom file. If you have a separate bundle, you can embed it in the plugin configuration.Example:<subPackages>     <subPackage>          <groupId>com.adobe.cq</groupId>          <artifactId>core...

Which version of AEM are you using?

The code looks good. What is the exact value you are trying to put?

Yes. You can export it from the the Assets Reports Console. Asset Reports

Check the "What is service ranking" section of this article Adobe Experience Manager Help | Getting Started with Adobe Experience Manager and OSGi bundles