chore(8.0): final pre-RC1 sweep — API consistency, named errors, orphans, zero-cast codebase

src/utils/structuredLogger.ts

@@ -306,7 +306,7 @@ export class StructuredLogger {
         name: error.name,
         message: error.message,
         stack: error.stack,
-        code: (error as any).code
+        code: (error as Error & { code?: string }).code
       }
     }