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/sale_order.py

@@ -53,6 +53,17 @@ class SaleOrder(models.Model):
              'sale order — stair lift, VPL, ceiling lift, ramp, bathroom mod, '
              'or tub cutout visits.',
     )
+
+    # Link to the assessment visit (one visit -> one SO per funding workflow).
+    visit_id = fields.Many2one(
+        'fusion.assessment.visit',
+        string='Assessment Visit',
+        readonly=True,
+        index=True,
+        help='The home visit this sale order was generated from. A visit '
+             'produces one sale order per funding workflow (ADP / MOD / ODSP / '
+             'private / ...).',
+    )
     
     # Authorizer helper field (consolidates multiple possible fields)
     portal_authorizer_id = fields.Many2one(