refactor: handler registry pattern — lib/apply/<ats>.mjs, applyToJob() routes by apply_type

lib/apply/wellfound.mjs

@@ -0,0 +1,10 @@
+/**
+ * wellfound.mjs — Wellfound ATS handler
+ * TODO: implement
+ */
+export const SUPPORTED_TYPES = ['wellfound'];
+
+export async function apply(page, job, formFiller) {
+  return { status: 'skipped_external_unsupported', meta: { title: job.title, company: job.company },
+           externalUrl: job.apply_url, ats_platform: 'wellfound' };
+}