fix: Fix BeforeValidator treating 0 as falsy in configuration fields #279

Job	Run time
PR title check	4s
Code checks / Actions lint check	36s
Code checks / Spell check	6s
Tests / E2E tests (3.14, ubuntu-latest)	5m 38s
Tests / Integration tests (3.10, ubuntu-latest)	1m 49s
Tests / E2E tests (3.10, ubuntu-latest)	5m 37s
Tests / Integration tests (3.14, ubuntu-latest)	2m 40s
Doc checks / Doc checks / Docs check	1m 25s
Code checks / Type check / Type check (3.12)	10s
Code checks / Type check / Type check (3.10)	11s
Code checks / Lint check / Lint check (3.12)	10s
Code checks / Type check / Type check (3.14)	15s
Code checks / Type check / Type check (3.13)	12s
Code checks / Lint check / Lint check (3.14)	17s
Code checks / Lint check / Lint check (3.10)	9s
Code checks / Lint check / Lint check (3.13)	17s
Code checks / Type check / Type check (3.11)	14s
Tests / Unit tests / Unit tests (windows-latest, 3.11)	1m 19s
Code checks / Lint check / Lint check (3.11)	15s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.13)	57s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.10)	56s
Tests / Unit tests / Unit tests (windows-latest, 3.10)	1m 20s
Tests / Unit tests / Unit tests (windows-latest, 3.13)	1m 22s
Tests / Unit tests / Unit tests (windows-latest, 3.14)	1m 17s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.12)	57s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.11)	1m 0s
Tests / Unit tests / Unit tests (windows-latest, 3.12)	1m 26s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.14)	58s
	31m 37s

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