[Fiona2016]

Problem

RemoteConfigStore.buildStoreKey built the key from host | applicationId | service | env | version, with version being the app version. The first session after every app upgrade therefore found no stored entry, was drawn on the init values, and had no settings version to report.

Change

• The app version is dropped from the key. An installed app runs one version at a time, so the previous release's stored settings are a better answer than the init values until the new fetch is stored.
• This matches the iOS SDK, whose cache key leaves the application version out for the same reason.
• app_version is still sent on the request.
• Entries written under the old layout can no longer be reached. The storage format is unchanged, so the prefix is not bumped. The existing age-based sweepAbandoned() removes those entries once they go unrefreshed. Its KDoc is updated.

Verification

• ./gradlew :features:dd-sdk-android-rum:testDebugUnitTest --tests '*RemoteConfig*': RemoteConfigStoreTest 22/22 and RemoteConfigControllerTest 78/78.
• New tests:
  • same key across app versions;
  • the key still differs by applicationId, env and service;
  • a value stored under one app version is read after the version changes.
• Sweep tests now use a legacy version-suffixed key.
• Negative control: with context.version back in the key, the 3 new tests fail.
• ktlint and detekt were not run locally.

🤖 Generated with Claude Code