fix(preprod): Parse dotted Apple build numbers instead of dropping them

[trevor-e]

Summary

• app_info.build (CFBundleVersion) is only guaranteed to be a plain integer for Android's versionCode. Apple allows up to three dot-separated non-negative integers (e.g. "1.2.3"), which the previous isdigit() check silently turned into None.
• That broke Sentry's build_number tiebreaker used to sort/find the latest build within a version, and also made those artifacts non-installable on the Sentry side (worked around there separately).
• Pack multi-component builds into a single sortable int by zero-padding each component to a fixed width; the existing plain-integer path (Android, and simple Apple builds) is unchanged.
• Also send the raw, unparsed build string as build_number_raw so Sentry can store/display the exact value later without another launchpad deploy. Sentry currently ignores unrecognized fields, so this is safe to ship ahead of that follow-up work.
• Adds unit tests for _parse_build_number (plain ints unchanged, dotted values packed and correctly ordered, malformed input falls back to None) and for _prepare_update_data's wiring of build_number/build_number_raw.

Known limitation (flagged in review): plain-integer build numbers stay small while packed dotted values are much larger, so if the same app_id/build_version ever has builds in both conventions, build_number alone doesn't reliably order them. This can't be resolved in launchpad — a single artifact update has no visibility into sibling artifacts' formats, and unifying the magnitude would break backward compatibility with every already-stored plain-integer build_number. The authoritative fix belongs in Sentry's tiebreak query once build_number_raw is available there (comparing the raw string directly for mixed-format cases), which is being scoped as a follow-up. Documented inline on _parse_build_number.

Test plan

• make test-unit (3 pre-existing, unrelated failures in Android APK signing/Swift symbol tests — confirmed present without this change)
• make check

[sentry]

📲 Install Builds

iOS

🔗 App Name	App ID	Version	Configuration
HackerNews	com.emergetools.hackernews	3.8 (1)	Release

Android

🔗 App Name	App ID	Version	Configuration
Hacker News	com.emergetools.hackernews	1.0.2 (13)	Release

⚙️ launchpad-test-android Build Distribution Settings

[trevor-e]

This field is stored as a BoundedBigInt in Sentry so it should be safe to pad like this.

[cursor]

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