Provide finer precision on LogLevel

Provide finer precision on the LoggingService LogLevel. For example, allow us to turn on messages for just single modules or subsystems, particularly debugging-level messages.

Otherwise the debug-level messages can be quite voluminous and cluttered.

Start by locating the LoggingService and its LogLevel implementation. Read how debug-level messages are currently enabled and identify whether module or subsystem context is available. The issue is complete when logging can be enabled selectively for individual modules or subsystems without the unrelated debug output.

Written by the indexing model from the issue text.