fix: JSON merging in publishing

Author: UladzislauK-Writer

.github/workflows/trigger-workflow.yml

@@ -30,7 +30,7 @@ jobs:
         repo_name="be.agent-manager"
         event_type="${{ inputs.event_type }}"
         commit_sha="${{ github.sha }}"
-        extra_payload="${{ inputs.extra_payload || '{}' }}"
+        extra_payload=$(echo '${{ inputs.extra_payload || "{}" }}')
 
         echo "Triggering agent manager with event_type=$event_type"
         echo "Extra payload (raw): $extra_payload"