Add optional referencedBy field to hostCompanyDetails validation schema and update HostService to handle referencedBy data

src/common/utils/validation/host/hostCompanyDetails.validation.ts

@@ -110,6 +110,10 @@ export const hostCompanyDetailsSchema = z.object({
     .int("Company type must be a valid integer")
     .min(1, "Company type is required"),
 
+
+  referencedBy: z.string()
+    .optional(),
+
   websiteUrl: z.string().nullable().optional(),
   instagramUrl: z.string().nullable().optional(),
   facebookUrl: z.string().nullable().optional(),