Replace invalid characters with underscore instead of removing them

Co-authored-by: TingluoHuang <1750815+TingluoHuang@users.noreply.github.com>

Author: Copilot

dist/index.js

@@ -36325,8 +36325,8 @@ function getUserAgentWithOrchestrationId(userAgent) {
     if (!orchestrationId) {
         return userAgent;
     }
-    // Sanitize orchestration ID - only keep alphanumeric, dots, hyphens, and underscores
-    const sanitized = orchestrationId.replace(/[^a-zA-Z0-9._-]/g, '');
+    // Sanitize orchestration ID - replace invalid characters with underscore
+    const sanitized = orchestrationId.replace(/[^a-zA-Z0-9._-]/g, '_');
     if (!sanitized) {
         return userAgent;
     }

package-lock.json

@@ -111,8 +111,8 @@ function getUserAgentWithOrchestrationId(userAgent: string): string {
     return userAgent
   }
 
-  // Sanitize orchestration ID - only keep alphanumeric, dots, hyphens, and underscores
-  const sanitized = orchestrationId.replace(/[^a-zA-Z0-9._-]/g, '')
+  // Sanitize orchestration ID - replace invalid characters with underscore
+  const sanitized = orchestrationId.replace(/[^a-zA-Z0-9._-]/g, '_')
   if (!sanitized) {
     return userAgent
   }