feat(fusion_portal): assessment-visit redesign - live on westin 19.0.2.9.0

Bundles multiple assessments per home visit; on completion groups them by
funding workflow (x_fc_sale_type) into one draft sale order per workflow
(March of Dimes / ADP / ODSP / WSIB / private / hardship / insurance).
Adds the mobility scooter ADP device type, the power-mobility home-access
rule, ADP multi-device combination guard, and the portal visit workspace.

Verified on a westin-v19 clone (clean registry load + funding-grouping
smoke test) then deployed to westin prod (fusion_portal 19.0.2.9.0).
Prod's pre-existing orphaned tax links were preserved (Odoo skips existing
FKs), pending a later audit.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

fusion_portal/models/__init__.py

@@ -7,5 +7,6 @@ from . import adp_document
 from . import assessment
 from . import accessibility_assessment
 from . import sale_order
+from . import visit
 from . import loaner_checkout
 from . import pdf_template