[MKT-828]:feat/Unify analytics tracking around explicit payment intents

[jaaaaavier]

Description

Unified Tracking Identifier: Removed all subscriptionId caching and extraction from the checkout tracking layer useUserPayment.ts, ga.service.ts, impact.service.ts. Analytics now exclusively read and pipe paymentIntentId for both standalone purchases and recurring subscriptions.

Related Issues

Related Pull Requests

Checklist

• Changes have been tested locally.
• Unit tests have been written or updated as necessary.
• The code adheres to the repository's coding standards.
• Relevant documentation has been added or updated.
• No new warnings or errors have been introduced.
• SonarCloud issues have been reviewed and addressed.
• QA Passed

Testing Process

Additional Notes

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
83.3% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud