case-history-migration

Use when migrating historical Case records — including CaseComments, EmailMessages, email attachments, and related files — from a legacy system into Salesforce Service Cloud. Covers strict object load order, EmailMessage Status='3' permanent locking, ContentDocumentLink Bulk API limitation, CaseHistory non-insertable constraint, and EmailMessageRelation setup. NOT for generic multi-object data migration planning (use data-migration-planning). NOT for ongoing email sync or Einstein Activity Capture configuration. NOT for Contact or Account record migration.