fix(metrics): publish metrics even if handler throw

[flochaz]

Description of your changes

Current code does not catch exception when wrapping handler call which prevent metrics to be published if error thrown.

How to verify this change

Added UT.

Related issues, RFCs

Fix #248

PR status

Is this ready for review?: YES
Is it a breaking change?: NO

Checklist

• My changes meet the tenets criteria
• I have performed a self-review of my own code
• I have commented my code where necessary, particularly in areas that should be flagged with a TODO, or hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• The code coverage hasn't decreased
• I have added tests that prove my change is effective and works
• New and existing unit tests pass locally and in Github Actions
• Any dependent changes have been merged and published in downstream module
• The PR title follows the conventional commit semantics

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[saragerion]

LGTM