- VendorAccessToken model + unique-index migration; TokenLifetimeDays config
- VendorPortalTokenService: CSPRNG token generation, rotation, revocation
- VendorPortalController: public portal API guarded by X-Vendor-Token header;
dispatches list/detail, accept, vendor status transitions, cancel request,
checklist updates, signoffs (vendor + customer), comments with dispatcher
attribution via AspNetUsers join
- VendorController: portal-token admin endpoints (get / rotate / revoke)
- WorkOrderController: dispatch email now uses vendor portal URL and HTML-encodes
user fields; AddDispatchComment now stores CommentType='dispatcher' with the
SHOC user's name so portal can attribute the author
- DispatchPublicController: deprecated per-dispatch GET accept flow returns a
static 'link no longer active' page (no state mutation)
