ESS-2234-2: Improvements to fetching aggregate data

[branislav-jenco-4ss]

This PR is related to user story ESS-2234

Description

A couple improvements to the work done on making a method to get aggregate data using the client.

• allowing an aggregation period input like "min" or "h", with meaning "1min", "1h"
• specifying the more familiar pandas abbreviations in doc strings
• adding a progress bar when paging (more like progress "information", as we don't know the total number of samples we're going to fetch"
• increased the default max_page_size because using 3600 is too low - the overhead for each requests then makes fetching the data overall a lot slower

paging.mp4

paging_jupyter.mp4

Checklist

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[bjorn-einar-bjartnes-4ss]

Excellent

[heidi-holm-4ss]

minor comment - example of usage in documentation uses "Avg", while docstring now only lists the pandas syntax. Besides that - nice work!

another thought - should example be from 2024 or something so that at least right now its within the last 90 days?

[branislav-jenco-4ss]

minor comment - example of usage in documentation uses "Avg", while docstring now only lists the pandas syntax. Besides that - nice work!

another thought - should example be from 2024 or something so that at least right now its within the last 90 days?

Good points, fixed :)