Make temporal mapper timezone aware

[Lee-W]

Why

Currently, CronPartitionedTimetable does not generate a timezone-aware partition key. Temporal partition mappers do not support timezone either. This might make the result misleading

What

Make CronParitionedTimetable generate a timezone-aware partition key by default and make partition mappers parse the time info and then output a timezone aware partition key

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[uranusjr]

Maybe the argument should be optional, and default to the configured timezone? That’s what the cron expression schedule does (although we didn’t implement it at the timetable level; the default timezone is inherited from the DAG object)

[Lee-W]

Maybe the argument should be optional, and default to the configured timezone? That’s what the cron expression schedule does (although we didn’t implement it at the timetable level; the default timezone is inherited from the DAG object)

Didn't know we have that, feel like I'll need to tweak CronParitionedTimetable a bit. Let me play with it and see how it works

[uranusjr]

We don’t need to do it in this PR either, or even in 2.3.0 (since adding a default is entirely backward compatible).

[Lee-W]

We don’t need to do it in this PR either, or even in 2.3.0 (since adding a default is entirely backward compatible).

yep, the issue I'm now wondering is whether timezone is handled correctly in the backfilled partitioned Dag run. Will fix this first and see whether I can resolve the thing you commented