Update cron dataset

manifest.json

@@ -0,0 +1,36 @@
+{
+  "format": "chatml",
+  "cron_variant": "unix-5-fields-or-INVALID",
+  "total_examples": 1564,
+  "train_examples": 1251,
+  "valid_examples": 156,
+  "test_examples": 157,
+  "model_for_synthetic_generation": "google/gemini-3.1-flash-lite",
+  "sources": {
+    "template": 1387,
+    "llm": 177
+  },
+  "families": [
+    "cron_aliases",
+    "daily_at",
+    "every_n_days",
+    "every_n_hours",
+    "every_n_minutes",
+    "except_weekday_at",
+    "hour_range_at",
+    "hourly_at_minute",
+    "invalid",
+    "midnight_noon_at",
+    "month_specific",
+    "monthly_on_day_at",
+    "multi_weekday_at",
+    "partial_week_range",
+    "twice_daily",
+    "weekdays_at",
+    "weekend_at",
+    "weekly_on_day_at"
+  ],
+  "special_outputs": [
+    "INVALID"
+  ]
+}