[AUTOMATIC] Update golden test files for backend integration tests

[RCGitBot]

This PR automatically updates the golden test files in purchases/src/test/resources/backend_integration_tests_golden/ based on the latest backend integration test results.

Generated from branch: main

Please review the changes to ensure they are expected.

---

Note

Low Risk
Test-only golden JSON updates; no application logic changed. Reviewers should confirm the new state_declarations field and Swedish localization fixes reflect intentional backend changes.

Overview
Refreshes golden snapshots under backend_integration_tests_golden/ so offerings backend integration tests match current live API responses (Fallback, Load Shedder, Production; regular and verified flows).

The recorded payloads now include an empty state_declarations object on paywall components (alongside slightly larger Content-Length values). In ui_config.localizations.sv, the num_day_* / num_week_* / num_month_* / num_year_* strings are updated from English placeholders to proper Swedish plural forms (e.g. %d dag / %d dagar, %d vecka / %d veckor).

No SDK or runtime code changes—only expected-response fixtures for integration tests.

^{Reviewed by Cursor Bugbot for commit bf47c92. Bugbot is set up for automated code reviews on this repo. Configure here.}