WIP: Add optional local profiling

[GianlucaFicarelli]

Add simple profiling that can be used locally where sentry isn't available.

[codecov]

Codecov Report

❌ Patch coverage is 41.66667% with 7 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
app/middleware.py	33.33%	2 Missing and 2 partials ⚠️
app/application.py	25.00%	2 Missing and 1 partial ⚠️

Flag	Coverage Δ
pytest	97.74% <41.66%> (-0.07%)	⬇️

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Files with missing lines	Coverage Δ
app/config.py	98.07% <100.00%> (+0.03%)	⬆️
app/application.py	86.11% <25.00%> (-3.60%)	⬇️
app/middleware.py	87.03% <33.33%> (-6.72%)	⬇️

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