fix(aso): pin App Store metadata sync to the pubspec version

[borgoat]

Problem

The app-store job of the Store metadata workflow (run 31571366372) spent 15 minutes in deliver's Cannot find edit app store version... Retrying loop until the job timeout killed it.

deliver can only write version-level metadata (release notes, promotional text) to an editable ("Prepare for Submission") App Store version. The Aug 8 sync was green because iOS 1.7.2 sat editable in ASC; that version's state has since changed (submitted for review?), so ASC currently has no editable version and deliver polls forever — the lane never tells it which version it's shipping.

Fix

Pass app_version (parsed from pubspec.yaml, currently 1.7.3) to upload_to_app_store:

• No editable version, nothing in review (steady state after a release): deliver creates the version and stages the metadata + release notes — exactly what we want for the next release.
• Editable version exists: deliver aligns its version string and updates it.
• A version is mid-review: fails fast with a real ASC error instead of blind-polling to timeout.

Verified locally: lane CWD is fastlane/ (so ../pubspec.yaml resolves), YAML parse yields 1.7.3, fastlane lanes parses clean. Merging this re-triggers the sync (workflow watches fastlane/**).

⚠️ Note: if ASC still holds an editable 1.7.2, this sync will rename it to 1.7.3 — desirable, since iOS 1.7.2 never shipped and Play is already on 1.7.3, but flagging it.

🤖 Generated with Claude Code