chore: update Paykit to rc70

[ben-kaufman]

This PR updates Bitkit to Paykit 0.1.0-rc70.

Follow-up to the merged #856, targeting master.

Description

• Updates Paykit for its Pubky 0.15 and pubky-noise rc13 integration.
• Documents the requirement for Homeserver 0.15 or newer on every serving instance; the SDK neither upgrades the homeserver nor verifies its version.

Pending markers and the five-minute uncertain-write cooldown remain in place; not all uncertain-publication cases are eliminated.

Design

N/A — no UI changes.

Preview

N/A

QA Notes

Journeys

N/A — no user-visible behaviour change.

Manual Tests

N/A

Automated Checks

• ran 732 focused Paykit, Pubky, contact, and authorization tests against the published rc70 XCFramework: all pass.
• ran a baseline compiler/format/translation diagnostic comparison: no introduced findings. The 69 source compiler warnings, 18 formatting findings, and 1,862 translation warnings also occur on the parent revision.
• ran release-artifact verification: the resolved rc70 commit and downloaded XCFramework checksum match the published release; generated Swift APIs are unchanged.

Simulator build passes. Physical-device, live-payment, homeserver-rollout, and performance behavior have not been validated by this dependency update.

[greptile-apps]

Confidence Score: 5/5

[High risk] Updates a core cryptographic and payment library dependency.

The PR appears safe to merge; no actionable defects were found.

Summary

Updates Paykit from 0.1.0-rc69 to 0.1.0-rc70.

• Updates the exact version and resolved commit together.
• Documents the Homeserver 0.15 requirement for every shared-state serving instance.
• Clarifies that pending markers and the five-minute cooldown remain.
• No actionable issues were found.

_{Reviews (1) · Last reviewed commit: "chore: update Paykit to rc70" · Reviewed by Greptile}

[ovi-reviewer]

Verdict: ✅ Approve

Review: diff 3 files.
Android master still uses Paykit rc69, and synonymdev/bitkit-android#1435 makes the same rc70 update and documents the same Homeserver 0.15 requirement and retained recovery behavior. Neither update changes the shared wire or storage formats.

QA:
I ran no tests because the description reports no user-visible change and requests no manual test or journey, only automated checks the author already ran.

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Reviewed by gpt-6.1-sol-high via gh-pr-review-loop skill
Commands: @ovi-reviewer review · test · retest

[ovitrif]

utAck