Dont recommend JSON for ClickStack

[gingerwizard]

Summary

Added page explaining the reasoning and make sure that any place that JSON was mentioned, it's very explicitly made clear that its not recommended.

Checklist

• Delete items not relevant to your PR
• URL changes should add a redirect to the old URL via https://github.com/ClickHouse/clickhouse-docs/blob/main/docusaurus.config.js
• If adding a new integration page, also add an entry to the integrations list here: https://github.com/ClickHouse/clickhouse-docs/blob/main/docs/integrations/index.mdx

[vercel]

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Project	Deployment	Actions	Updated (UTC)
clickhouse-docs	Ready	Preview, Comment	May 8, 2026 0:42am

4 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
clickhouse-docs-jp	Ignored		May 8, 2026 0:42am
clickhouse-docs-ko	Ignored	Preview	May 8, 2026 0:42am
clickhouse-docs-ru	Ignored	Preview	May 8, 2026 0:42am
clickhouse-docs-zh	Ignored	Preview	May 8, 2026 0:42am

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
2 out of 3 committers have signed the CLA.

✅ Blargian
✅ gingerwizard
❌ Dale McDiarmid

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