fix(cron): deliver the drift-skip alert untruncated

The generic failure summarizer caps unrecognized errors at 180 chars,
which cut the drift alert off mid-sentence before the pin command. The
drift branch now formats its own delivery from the guard's full message,
so the one alert the operator gets actually contains the fix.

cron/scheduler.py

@@ -4879,12 +4879,17 @@ def run_one_job(
             else:
                 deliver_content = final_response if success else _summarize_cron_failure_for_delivery(job, error)
                 if drift_skip and not success:
-                    # Drift-skip alert: strip the internal marker from the
-                    # user-facing text (the summarizer passes the message
-                    # through its generic tail).
-                    deliver_content = re.sub(
-                        r"\[drift_skip[^\]]*\]\s*", "", deliver_content
+                    # Drift-skip alert: bypass the generic summarizer's
+                    # 180-char truncation (it would eat the remediation
+                    # command) and strip the internal marker — deliver the
+                    # guard's own actionable message intact.
+                    _drift_text = re.sub(
+                        r"\[drift_skip[^\]]*\]\s*", "", str(error)
                     ).strip()
+                    deliver_content = (
+                        f"⚠️ Cron '{job.get('name') or job['id']}' skipped: "
+                        f"{_drift_text}"
+                    )
             # Treat whitespace-only final responses the same as empty
             # responses: do not deliver a blank message, and let the
             # empty-response guard below mark the run as a soft failure.

tests/cron/test_cron_drift_alert_once.py

@@ -92,6 +92,10 @@ class TestDriftAlertOnce:
         blob = deliveries[0].lower()
         assert "drift" in blob
         assert "pin" in blob
+        # The single alert must carry the complete remediation command —
+        # the generic summarizer's 180-char truncation must not eat it.
+        assert "cronjob action=update" in deliveries[0]
+        assert "[drift_skip" not in deliveries[0]
 
     def test_healed_drift_clears_bit_and_redrift_realerts(self, tmp_path):
         job = _job()