unusedGraphInputsSeverity
Severity for unused graph inputs, such as factory parameters and directly included binding containers that are not used by the graph.
WARN by default.
Note: DiagnosticSeverity.IDE_WARN and DiagnosticSeverity.IDE_ERROR are not supported here because unused-input detection only runs during IR (a CLI-only phase). Attempting to set an IDE-only severity will fail the build with a validation error.