ExclusivePluginQueryIgnoreDisabledTest now sets the ">" plugin's Disabled property to true in PluginMetadata. This verifies that QueryBuilder correctly ignores disabled exclusive plugins.
Refactored QueryBuilderTest.cs to use Dictionary<string, List<PluginPair>> for nonGlobalPlugins, updating test cases to use lists of PluginPair. Also replaced empty dictionary instantiation with shorthand [] where appropriate.