fix(cron): accept bare duration units like 'hour' in schedule parsing

contributors/emails/salch-cred@users.noreply.github.com

@@ -0,0 +1 @@
+salch-cred

cron/jobs.py

@@ -782,13 +782,14 @@ def parse_duration(s: str) -> int:
         "30m" → 30
         "2h" → 120
         "1d" → 1440
+        "hour" → 60 (bare unit, no leading number)
     """
     s = s.strip().lower()
-    match = re.match(r'^(\d+)\s*(m|min|mins|minute|minutes|h|hr|hrs|hour|hours|d|day|days)$', s)
+    match = re.match(r'^(\d*)\s*(m|min|mins|minute|minutes|h|hr|hrs|hour|hours|d|day|days)$', s)
     if not match:
         raise ValueError(f"Invalid duration: '{s}'. Use format like '30m', '2h', or '1d'")
     
-    value = int(match.group(1))
+    value = int(match.group(1)) if match.group(1) else 1
     unit = match.group(2)[0]  # First char: m, h, or d
     
     multipliers = {'m': 1, 'h': 60, 'd': 1440}