Add OAuth2 login to clickhouse-client (--login / --login=device)#1606

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BorisTyshkevich wants to merge 5 commits intoantalya-26.1from

feature/client-IdP

Commits on Apr 14, 2026

Add OAuth2 login to clickhouse-client via credentials JSON file

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zvonand
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split code
zvonand
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Commits on Apr 17, 2026

fix test
zvonand
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Commits on Apr 19, 2026