fix: block build when RebulidDEBRepoByAnsible is running

Prevents test installation failures caused by apt-get hitting the
repository while it is being rebuilt by the Ansible republish job.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Vitexus

debian/Jenkinsfile

@@ -14,7 +14,13 @@ String vendor = 'vitexsoftware'
 String imagePrefix = 'multiflexi-'
 
 properties([
-    copyArtifactPermission('*')
+    copyArtifactPermission('*'),
+    buildBlocker(
+        useBuildBlocker: true,
+        blockLevel: 'GLOBAL',
+        scanQueueFor: 'ALL',
+        blockingJobs: 'RebulidDEBRepoByAnsible'
+    )
 ])
 
 node {