Adjust default behavior of "migrate" command

[SchrodingersGat]

• Does not create new migration files automatically
• Ref: Conflicting migrations detected when upgrading 1.3.3 -> 1.4.1 #12311

The existing default behavior on "invoke update" is to create new migration files if the database schema has changed. This may lead to the situation outlined in #12311 where we end up with out-of-line migrations.

Tasks

• Add breaking changelog entry

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[Copilot]

Pull request overview

This PR changes the default behavior of the invoke migrate task so it no longer auto-generates new Django migration files during routine operations (notably invoke update), reducing the risk of creating out-of-line/conflicting migrations during upgrades (ref #12311).

Changes:

• Change migrate() default from detect=True to detect=False so migration file generation is opt-in.
• Update CI workflows to explicitly run invoke migrate --detect before checking for uncommitted migration files.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
tasks.py	Makes migration auto-detection opt-in and expands the task docstring/arguments.
.github/workflows/qc_checks.yaml	Runs invoke migrate --detect prior to migration-file checks in QC workflow.
.github/workflows/check_translations.yaml	Runs invoke migrate --detect prior to migration-file checks in translations workflow.

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[SchrodingersGat]

@matmair LMK what you think of this - it changes the default behavior but in general, users should NOT be in a situation where they are generating new migration files