The git-tag pin worked, but the build failed: "could not find compatible versions
… In snapshot (Podfile.lock): LiveKitClient (= 2.0.18) … In Podfile: LiveKitClient
(from git, tag 2.15.3)". Cause: `npx cap sync` runs `pod install` internally with
the PRE-pin Podfile, creating a Podfile.lock pinned to 2.0.18; our injected git-tag
source then conflicts with that lock. Fix: rm the Podfile.lock right after injecting
the pin so the real "Install CocoaPods" step re-resolves against tag 2.15.3.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>