Update safe_find_or_create_by docs

What does this MR do and why?

This MR extends the .safe_find_or_create_by and proposes and alternative approach.

MR acceptance checklist

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assigned to @ahegyi

added documentation label

	1 Warning
	Please add a merge request subtype to this merge request.

	1 Message
	This merge request adds or changes documentation files. A review from the Technical Writing team before you merge is recommended. Reviews can happen after you merge.

Documentation review

The following files require a review from a technical writer:

• doc/development/sql.md (Link to current live version)

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changed the description

changed milestone to %16.4

@ahegyi - please see the following guidance and update this merge request.

	1 Error
	Please add typebug typefeature, or typemaintenance label to this merge request.

added docs-only label

added 1 commit

• 198b598a - Update safe_find_or_create_by docs

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added typemaintenance label

Hi @huzaifaiftikhar1 ,

Could you do the initial review?

requested review from @huzaifaiftikhar1

Setting label groupoptimize based on @ahegyi's group.

added groupoptimize label

Setting label(s) devopsplan sectiondev based on groupoptimize.

added devopsplan sectiondev labels

removed review request for @huzaifaiftikhar1

added 1 commit

• 1b0bb48c - Update safe_find_or_create_by docs

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