feat(ios): update for 4.15.4

[dcrawbuck]

iOS SDK 4.15.3 -> 4.15.4

Upstream diff: git diff 4.15.3..4.15.4 in reference/ios
Changelog source: https://github.com/superwall/Superwall-iOS/blob/main/CHANGELOG.md

Checklist of doc updates performed

• Bumped <SdkLatestVersion version="4.15.4"> in content/docs/ios/index.mdx
• Bumped <SdkLatestVersion version="4.15.4"> in content/docs/ios/sdk-reference/index.mdx
• Added 4.15.4 changelog entry to content/docs/ios/changelog.mdx (additive, history preserved)
• Added .singularDeviceId to IntegrationAttribute Types list in content/docs/ios/sdk-reference/setIntegrationAttributes.mdx

What changed in 4.15.4

Single enhancement: adds singularDeviceId as an IntegrationAttribute (Singular SDID).

Verification

• bun test: 65 pass, 0 fail
• bun run build:cf: OOM-killed in sandbox environment (memory constraint); no code errors

Follow-up tasks / known gaps

None. This is a purely additive patch release.

---

Note

Low Risk
Documentation-only updates with no application or SDK code changes.

Overview
Documents Superwall iOS SDK 4.15.4 across the iOS docs: the latest version badge moves from 4.15.3 to 4.15.4 on the welcome and SDK reference overview pages, and a new 4.15.4 changelog section records the release.

The only functional note in this release is singularDeviceId as an IntegrationAttribute (Singular SDID). The setIntegrationAttributes reference now lists .singularDeviceId alongside the other built-in integration keys, with a 4.15.4+ version note.

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Status	Name	Latest Commit	Updated (UTC)
✅ Deployment successful! View logs	superwall-docs	aa8cf3c	Jun 29 2026, 04:16 PM