refactor(companies): one verified identity per company, no general manager

Replaces the owner/general-manager/PoA trio with a single identity whose
subject is the PoA when the company declares one and the owner otherwise.

- Drop the general manager everywhere: entity columns, DTOs, required-field
  list, self-service attributes, gm* identity handling.
- New explicit poaDeclared answer ("yes"/"no") replaces poaSameAsOwner. A
  DARS delegation letter is required iff it is "yes"; a freight forwarder is
  forced to "yes" server-side and gets no waiver.
- Owner name/email/phone become typeable and required, prefilled from the
  eTrade lookup, never falling back to the authenticated account.
- Store eTrade's manager separately (etradeManagerName/Phone) and expose
  ownerMatchesEtrade so backoffice compares the asserted owner against the
  licence instead of against itself.
- Foreign companies satisfy the identity with Fayda or a passport number, on
  whichever subject is verifying (poaPassportNumber added).
- Write companies.email/phone from the owner unconditionally, so a company
  without a Fayda-verified owner still has a notification address.

apps/edr-freight-api/src/seed/approved-first-lastmile-demo-bookings.seeder.ts

@@ -247,9 +247,6 @@ export class ApprovedFirstLastMileDemoBookingsSeeder {
           website: null,
           contactPersonName: 'First Last Mile Demo',
           contactPersonPhone: '251900000101',
-          generalManagerName: 'Demo Manager',
-          generalManagerEmail: COMPANY_EMAIL,
-          generalManagerPhone: '251900000101',
         },
         { conflictPaths: { tin: true } },
       );

apps/edr-freight-api/src/seed/demo-bookings.seeder.ts

@@ -324,9 +324,6 @@ export class DemoBookingsSeeder {
           website: null,
           contactPersonName: "Train Scheduling",
           contactPersonPhone: "251900000001",
-          generalManagerName: "Demo Manager",
-          generalManagerEmail: COMPANY_EMAIL,
-          generalManagerPhone: "251900000001",
         },
         { conflictPaths: { tin: true } },
       );

apps/edr-freight-api/src/seed/paid-import-export-mile-demo.seeder.ts

@@ -175,9 +175,6 @@ export class PaidImportExportMileDemoSeeder {
           website: null,
           contactPersonName: 'Paid Mile Demo',
           contactPersonPhone: '251900000202',
-          generalManagerName: 'Demo Manager',
-          generalManagerEmail: COMPANY_EMAIL,
-          generalManagerPhone: '251900000202',
         },
         { conflictPaths: { tin: true } },
       );