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/scripts/seed-negad-indode-arrived-train.ts

@@ -157,9 +157,6 @@ async function main() {
             email: 'negad-indode-demo@edr.local',
             contactPersonName: 'Marshalling Demo',
             contactPersonPhone: '251900000202',
-            generalManagerName: 'Demo Manager',
-            generalManagerEmail: 'negad-indode-demo@edr.local',
-            generalManagerPhone: '251900000202',
           }),
         ));