Registration no longer crashes if email verification fails to send.
Also fix mail host: srv-captain--poste-io -> srv-captain--mail.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

- Rename portfolio_items migration to run before application_portfolio_items pivot
- Fix materialized view referencing cp.niches (should be cp.content_niches) and remove nonexistent last_active_at column
- Make entrypoint non-fatal on migration failure with DB wait loop
- Health endpoint always returns 200 (degraded status in body) to prevent Docker killing healthy containers
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

symfony/translation in the lock file requires PHP >= 8.4.1, causing
container crash on startup with the 8.3 image.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Covers Auth (registration, login, email verification, password reset, username validation),
Admin (user management, company approval, impersonation, audit log, dashboard stats),
Companies (profile CRUD, social link normalization, completion scoring, approval flow),
Creators (profile CRUD, username throttle, completion scoring, scopes, policies),
and Settings (platform settings CRUD, caching, CSS generation, feature flags).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>