chore(kno-15013): document CSS inlining setting

[cellomatt]

Description

This PR adds documentation for the environment-level CSS inlining setting on an email channel's configuration.

I also took the opportunity while here to fix some small issues on the AWS SES provider page:

• Update callout to use more-recent style conventions and clean up copy
• Move the section on delivery status webhooks to the same location as other pages (beneath channel configuration, additional data sent, recipient requirements, etc.)

[linear-code]

KNO-15013

[vercel]

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Project	Deployment	Actions	Updated (UTC)
docs	Ready	Preview	Aug 28, 2026 8:25pm

[cursor]

Risk MEDIUM: Documents the per-environment CSS inlining channel setting across all email provider integration pages.

Reasons

• Only MDX content files are modified — no code, config, sidebar, or OpenAPI spec changes
• 14 files updated in a single section (content/integrations/email/), adding a consistent CSS inlining <Attribute> entry to each provider page
• aws-ses.mdx triggers the substantial rewrite rule with 92 additions and 89 deletions (section reordering of delivery status webhooks and Callout formatting updates)
• Total diff is 165+/102- across 14 files, larger than typical LOW-risk changes but scoped to documentation-only edits
• Author cellomatt is a known team member; approval withheld because risk is MEDIUM, not LOW

Notes

• Verify the CSS inlining attribute description is accurate and consistent across all 13 provider pages
• Review the aws-ses.mdx reorganization (delivery status webhooks moved to end of page, Callout format change) for broken anchor links or navigation flow
• Confirm the overview page link to dashboard channel configuration resolves correctly
• Check that <br /> spacing between Attributes blocks renders as intended

  

_{Sent by Cursor Automation: Docs PR classifier}