fix: dont validate crontab in backend

app/models/task.py

@@ -5,9 +5,6 @@ import tortoise.validators
 
 from app.models.base import AbstractModel
 
-# https://stackoverflow.com/a/57639657
-CRONTAB_REGEX = r"^(@(annually|yearly|monthly|weekly|daily|hourly|reboot))|(@every (\d+(ns|us|µs|ms|s|m|h))+)|((((\d+,)+\d+|(\d+(\/|-)\d+)|\d+|\*) ?){5,7})$"
-
 
 class Task(AbstractModel):
     list_name = tortoise.fields.CharField(max_length=128, db_index=True, null=False)
@@ -15,7 +12,6 @@ class Task(AbstractModel):
     reset_cron = tortoise.fields.CharField(
         max_length=64,
         null=True,
-        validators=[tortoise.validators.RegexValidator(CRONTAB_REGEX, 0)],
     )
     check_date = tortoise.fields.DatetimeField(null=True)
     previous_check_date = tortoise.fields.DatetimeField(null=True)