fix: update error parameter type in logError function

- Changed the type of the 'error' parameter in the logError function from 'unknown' to 'Error | string' for better type safety and clarity.

Author: ssdeanx

src/mastra/config/logger.ts

@@ -164,7 +164,7 @@ export const logAgentActivity = (
 
 export const logError = (
     component: string,
-    error: unknown,
+    error: Error | string,
     context?: Record<string, unknown>
 ) => {
     const message = `❌ Error in ${component}`