Onboarding: fix personal-team builds, then activate production QR links

[timohueser]

Current work: unblock personal-team builds

companion-ios/project.yml unconditionally enables Associated Domains. A personal development team cannot sign that capability. The owner reports that a clean obc ios-companion build fails; the local entitlement removal is not a repository fix.

• Gate the entitlement through the existing local signing configuration, or remove it until paid-team release setup is ready. Keep the fix small.
• Confirm a clean personal-team device build installs with obc ios-companion. Preserve simulator builds and pairing-link handling.

This source build defect is actionable during the cleanup week. It does not wait for the App Store.

Later production link activation

The fixed QR link and app handler are implemented in #2237/#2254. The coming-soon page is live through #2255. Remaining owner/external steps:

• Supply a paid Apple team and release app identifiers.
• Serve the association file with the selected app identifier and /app path. Verify its live response and file handling on the actual host.
• Add the real App Store/TestFlight handoff when IDs exist.
• Test installed/not-installed app states and two nearby unpaired devices on a real phone.

Device setup acceptance belongs to #2214. This issue does not authorize App Store publication or purchases.

Requirements: none

[timohueser]

Device builds fail on a personal team (found on 2 October).

companion-ios/project.yml already adds com.apple.developer.associated-domains with applinks:openbikecomputer.com (commit 9175102, #2254). A personal development team cannot sign this capability, so obc ios-companion fails for the owner's iPhone:

Personal development teams, including "Timo Hüser", do not support the Associated Domains capability.

The release-day build on 2 October removed the entitlement in a local checkout only, to install the planner build.

To do (pick one):

1. Add the entitlement only when a paid team is set, for example through project.local.yml, so a personal team can build again.
2. Or remove it until this issue has the paid team and the association file, and add it back with the link handling.

Pass bar: obc ios-companion installs on a phone signed with a personal team from a clean develop checkout.