ci: adopt develop as integration branch

[awesomestvi]

Summary

• describe the change
• note any relevant UI or behavior impact

Review checklist

• Shared UI was added to packages/app/src/components/primitives/ or packages/app/src/components/patterns/ when appropriate
• If this adds shared UI, I can explain why it is not a primitive, pattern, or token when applicable
• packages/app/src/components/shared/ was only used for app-specific shared UI or compatibility shims
• Storybook stories were added or updated for shared UI changes
• pnpm check:stories passes
• pnpm check:ui-kit passes
• Documentation was updated if Storybook taxonomy, component ownership, or UI system guidance changed
• I tested responsive behavior where the UI changed
• I tested relevant theme states where the UI changed