Clarify Python scheduled function requirements (#315)

docs/python/reference/decorators.md

@@ -101,7 +101,7 @@ DBOS.scheduled(
 
 Run a function on a schedule specified using [crontab](https://en.wikipedia.org/wiki/Cron) syntax. See [here](https://docs.gitlab.com/ee/topics/cron/) for a guide to cron syntax and [here](https://crontab.guru/) for a crontab editor.
 
-The annotated function must take in two parameters: The time that the run was scheduled (as a `datetime`) and the time that the run was actually started (also a `datetime`).
+The annotated function must take in two parameters: The time that the run was scheduled (as a `datetime`) and the time that the run was actually started (also a `datetime`).  Functions within classes may be marked as `@staticmethod` to meet this requirement.
 
 **Example:**
 ```python

docs/python/tutorials/scheduled-workflows.md

@@ -14,7 +14,7 @@ def example_scheduled_workflow(scheduled_time: datetime, actual_time: datetime):
     DBOS.logger.info("I am a workflow scheduled to run once a minute. ")
 ```
 
-Scheduled workflows must take in exactly two arguments: the time that the run was scheduled (as a `datetime`) and the time the run was actually started (as a `datetime`).
+Scheduled workflows must take in exactly two arguments: the time that the run was scheduled (as a `datetime`) and the time the run was actually started (as a `datetime`).  Note that this means scheduled workflows should either be plain functions, or be `@staticmethod` class members.
 
 To learn more about crontab syntax, see [this guide](https://docs.gitlab.com/ee/topics/cron/) or [this crontab editor](https://crontab.guru/). DBOS uses [croniter](https://pypi.org/project/croniter/) to parse cron schedules, which is able to do second repetition and by default we use seconds as the first field.
 The specification for the DBOS variant can be found in the [decorator reference](../reference/decorators.md#scheduled).