Release #1092 — Task-96056: cross-project social login fallback

[vichugofsl]

Release of #1092 to master

Cherry-picks the single commit from #1092 (2f38dc41) onto master for production release. No other develop changes are included.

What it does

Task-96056 — Hosanna (project 63452) shares the dbp_users database with Bible.is (52341). When an existing Bible.is user signs into Hosanna with a social provider that sends no email (Facebook without email, or Apple ID on repeat sign-in), the project-scoped account lookup missed and there was no email to fall back on, leading to duplicate accounts or a blocked 401.

This adds a cross-project fallback on the social identity itself (provider_id + provider_user_id), parallel to the existing email fallback:

• Oldest matching account wins; soft-deleted users are skipped.
• A one-time linked_from_project field is returned on the login where the cross-project link happens.
• project_id is validated up front, returning a clean 404 instead of a 500 on an unknown project.

Ref: #1092

NOTE 1

See the PR: #1092 to check the optional database change (index).

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

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

See analysis details on SonarQube Cloud