chore: add backlog-notify onStatusChange hook

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

backlog/config.yml

@@ -1,5 +1,15 @@
-project_name: CosmoLocal Website
-project_id: cosmolocal-website
-description: CosmoLocal World website and related infrastructure
-created: '2026-02-09'
-integration_mode: mcp
+project_name: "CosmoLocal Website"
+statuses: ["To Do", "In Progress", "Done"]
+labels: []
+milestones: []
+date_format: yyyy-mm-dd
+max_column_width: 80
+auto_open_browser: true
+default_port: 6420
+remote_operations: true
+auto_commit: false
+bypass_git_hooks: false
+check_active_branches: true
+active_branch_days: 30
+task_prefix: "task"
+onStatusChange: 'python3 /home/jeffe/Github/dev-ops/scripts/backlog-notify.py'