Keep public key as a jwk json obj instead

backend/src/db/migrations/20251027234547_add-pki-acme.ts

@@ -54,8 +54,8 @@ export async function up(knex: Knex): Promise<void> {
       // Multi-value emails array
       t.specificType("emails", "text[]").notNullable();
 
-      // Public key (PEM format)
-      t.text("publicKey").notNullable();
+      // Public key (JWK format)
+      t.jsonb("publicKey").notNullable();
 
       t.timestamps(true, true, true);
     });

backend/src/db/schemas/pki-acme-accounts.ts

@@ -11,7 +11,7 @@ export const PkiAcmeAccountsSchema = z.object({
   id: z.string().uuid(),
   profileId: z.string().uuid(),
   emails: z.string().array(),
-  publicKey: z.string(),
+  publicKey: z.unknown(),
   createdAt: z.date(),
   updatedAt: z.date()
 });