fix: sequential save in convertPlainText to avoid race condition on raw_text

fix: save plain text CV on convert + load raw text on cv-editor page load

fix: isolate ALTER TABLE in own transaction to prevent PG InFailedSqlTransaction + auto-save CV editor

fix: scrapers, cron, design, filters, categories, graduate detection

Add super admin user role with view toggle

Add about.html with dev profile + how-to section

Initial commit: Joblin platform