fix: Fix BeforeValidator treating 0 as falsy in configuration fields #280

Job	Run time
PR title check	4s
Code checks / Spell check	8s
Tests / Integration tests (3.10, ubuntu-latest)	2m 3s
Tests / E2E tests (3.10, ubuntu-latest)	5m 7s
Tests / E2E tests (3.14, ubuntu-latest)	4m 40s
Code checks / Actions lint check	25s
Doc checks / Doc checks / Docs check	1m 14s
Code checks / Lint check / Lint check (3.13)	14s
Tests / Integration tests (3.14, ubuntu-latest)	1m 41s
Code checks / Lint check / Lint check (3.14)	18s
Code checks / Lint check / Lint check (3.10)	9s
Code checks / Lint check / Lint check (3.11)	9s
Code checks / Type check / Type check (3.14)	16s
Code checks / Type check / Type check (3.12)	12s
Code checks / Lint check / Lint check (3.12)	12s
Code checks / Type check / Type check (3.13)	17s
Code checks / Type check / Type check (3.10)	12s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.14)	58s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.13)	1m 0s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.10)	56s
Tests / Unit tests / Unit tests (windows-latest, 3.14)	1m 24s
Tests / Unit tests / Unit tests (windows-latest, 3.10)	1m 22s
Tests / Unit tests / Unit tests (windows-latest, 3.11)	1m 19s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.12)	1m 1s
Tests / Unit tests / Unit tests (windows-latest, 3.12)	1m 19s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.11)	1m 0s
Tests / Unit tests / Unit tests (windows-latest, 3.13)	1m 23s
Code checks / Type check / Type check (3.11)	14s
	29m 17s

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