v1.5.1

Added

• Automation webhook action implemented. When an automation rule with a
  webhook action fires, the agent now sends a POST (JSON, 10s timeout) to the
  configured URL with the trigger context: rule_id, metric, operator,
  threshold, value and fired_at (RFC3339). The result is reported back as the
  rule's exit status: 0 on a 2xx response, the HTTP status code otherwise (e.g.
  404, 500), or 1 on a transport error — so the panel's "Executions" tab shows
  a meaningful outcome. (Previously this action was a no-op.)