fix(core): handle stack overflow on stm32f4 properly

[cepetr]

This PR fixes incorrect stack overflow handling on STM32F4 models. Instead of reporting SO (stack overflow), the RSOD shows HF (hard fault).

We still show SO @ 0x00000000, because the return address cannot be resolved.

[coderabbitai]

🚥 Pre-merge checks | ✅ 3 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.
Description check	⚠️ Warning	The PR description is minimal and lacks required template sections for core developer PRs, including project assignment, priority, team, sprint, and development status information.	Add required sections from the template: assign yourself, add to Firmware project with Priority/Team/Sprint, and set development status (e.g., 'In Progress' for draft PRs, 'Needs Review' for final PRs).

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: fixing stack overflow handling on STM32F4 by inverting control flow in MemManage_Handler.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch cepetr/so-rsod-fix

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[github-actions]

en main(all)

model	device_test	click_test	persistence_test
T2T1	test(all) main(all)	test(all) main(all)	test(all) main(all)
T3B1	test(all) main(all)	test(all) main(all)	test(all) main(all)
T3T1	test(all) main(all)	test(all) main(all)	test(all) main(all)
T3W1	test(all) main(all)	test(all) main(all)	test(all) main(all)

Latest CI run: 24999470436