feat: expand companion platform, device controls, and memoir workflows

Add customer and operator login, BLE provisioning, device fleet controls, call memory, memoir generation, and refreshed family and maintenance portals. Include API contracts, migrations, firmware sources, tests, assets, and deployment documentation.

migrations/000059_call_memory_contract.down.sql

@@ -0,0 +1,3 @@
+-- This migration contains deletion evidence and source-suppression records.
+-- Refuse automated rollback so restoring an old schema cannot silently resurrect data.
+DO $$ BEGIN RAISE EXCEPTION 'CALL-MEMORY-1.1 downgrade requires an audited export and deletion-ledger replay; use a forward migration'; END $$;