Add parked alias domains with Arvan or Cloudflare DNS and websites SSL.

Co-authored-by: Cursor <cursoragent@cursor.com>

database/migrations/078_domain_parked_hosts.sql

@@ -0,0 +1,7 @@
+-- Parked alias hosts that 301 to the canonical domain (apex + www only).
+
+ALTER TABLE domains
+  ADD COLUMN IF NOT EXISTS parked_hosts TEXT[] NOT NULL DEFAULT '{}';
+
+CREATE INDEX IF NOT EXISTS idx_domains_parked_hosts
+  ON domains USING GIN (parked_hosts);