Format "Airflow DAG Load Data Complete" duration

[zackkrida]

Description

The notifications are amazing! But currently show the duration in seconds like this:

We might want to:

• Round
• Convert to a human readable duration (for example, "47 minutes", "1 hour", or alternatively something like "hh:mm:ss")

This is a very minor concern 😄

Relevant file

https://github.com/WordPress/openverse-catalog/blob/5188b388759a00c42785ca79f0c96949396d4d68/openverse_catalog/dags/common/loader/reporting.py#L18

[AetherUnbound]

We'll want to tackle #1645 before this, since duration will be a float after that and will make it easier to round/manipulate.

I think it may also be worth adding a comma separation¹ to the record upsert count (e.g. f"Count: {value:,}")

Footnotes

1. https://docs.python.org/3/library/string.html#format-specification-mini-language ↩