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Benjamin
249849b3ed
- Add instance_metadata table with unique UUID per instance - Add tenant_id column to all business tables (documents, signatures, expected_signers, webhooks, reminder_logs, email_queue, checksum_verifications, webhook_deliveries) - Backfill existing data with instance tenant UUID - Create TenantProvider interface and SingleTenantProvider implementation - Update all repositories to filter by tenant_id - Add immutability triggers to prevent tenant_id modification after creation Migration 0015 includes: - Schema changes with indexes for tenant_id columns - SQL backfill for existing data - Trigger functions for data integrity