feat: add poa and poa delegation file to onboarding

apps/edr-freight-api/src/seed/file-upload-settings.seeder.ts

@@ -18,6 +18,28 @@ interface OnboardingField {
 
 const DOC_EXTENSIONS = ["pdf", "jpg", "jpeg", "png"];
 
+/** fileKey of the delegation letter attached to the Power of Attorney step. */
+export const POA_DELEGATION_FILE_KEY = "poa_delegation_letter";
+
+/**
+ * Seeded as optional: the delegation letter is only mandatory once a PoA has
+ * been entered, or when the company operates as a freight forwarder. That rule
+ * spans form fields as well as files, so it lives in the onboarding gate
+ * (companies.service.getOnboardingRequirements) rather than in `isRequired`.
+ */
+const poaDelegationField = (displayOrder: number): OnboardingField => ({
+  fileKey: POA_DELEGATION_FILE_KEY,
+  fileLabel: "PoA Delegation Letter",
+  helpText:
+    "Signed letter in which the General Manager delegates the representative named above.",
+  isRequired: false,
+  isMultiple: false,
+  maxFiles: 1,
+  allowedExtensions: DOC_EXTENSIONS,
+  maxSizeMb: 10,
+  displayOrder,
+});
+
 /** Documents required from an Ethiopian company at onboarding. */
 const ETHIOPIAN_ONBOARDING_FIELDS: OnboardingField[] = [
   {
@@ -54,6 +76,7 @@ const ETHIOPIAN_ONBOARDING_FIELDS: OnboardingField[] = [
     maxSizeMb: 10,
     displayOrder: 3,
   },
+  poaDelegationField(4),
 ];
 
 /** Documents required from a Foreign company at onboarding. */
@@ -102,6 +125,7 @@ const FOREIGN_ONBOARDING_FIELDS: OnboardingField[] = [
     maxSizeMb: 10,
     displayOrder: 4,
   },
+  poaDelegationField(5),
 ];
 
 /** Legacy combined set, kept for the older per-company-type codes. */