How should a developer enable remote debugging of an AEM server without modifying the AEM start script?

A custom AEM application has a run time dependency to a third party OSGi bundle that is NOT included in out-of-the-box AEM. The third party dependency needs to be available for multiple applications and be upgraded separately from the custom AEM application.
How should a developer make sure that the bundle is installed on all environments?

A custom AEM application contains a service component that needs to access the JCR repository within the activate method. The activate method uses ResourceResolverFactory.getServiceResourceResolver(...) without specifying a sub service name.
What should a developer do to make sure the user service mapping for the service component is available?

A developer creates a custom Client Library named foobar.
This Client Library embeds 5 other Client Libraries and contains 10 JavaScript source files. One of these files, called foo.js, has a bug on line 8 which causes an exception. The Client Library is throwing this exception on line 1350 when it is included on a webpage.
How should a developer find the exact line in foo.js where the exception has been thrown?

A developer is installing a content package with the package manager. The developer needs to restrict the approximate number of nodes in a batch that is saved to persistent storage in one transaction.
How should the developer modify the number of transient nodes to be triggered until automatic saving?