DOT intake: review-only (no telecom entity step), email verifier,

updated flagger excluding 4+ year stale carriers

- Intake manifest: DOT services use ["review"] only, skipping the
  telecom entity step with FRN/USAC fields
- Flagger: excludes 4+ year overdue carriers from campaign (spam
  trap risk). 18,277 safe targets from 100K records.
- Email verifier: self-hosted MX + SMTP verification tool

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

site/src/lib/intake_manifest.ts

@@ -102,14 +102,16 @@ export const INTAKE_MANIFEST: Record<string, IntakeStep[]> = {
   ],
 
   // ── DOT / FMCSA Motor Carrier Services ──────────────────────────
-  "mcs150-update":       ["entity", "review", "payment"],
-  "boc3-filing":         ["entity", "review", "payment"],
-  "ucr-registration":    ["entity", "review", "payment"],
-  "dot-registration":    ["entity", "review", "payment"],
-  "mc-authority":        ["entity", "review", "payment"],
-  "dot-drug-alcohol":    ["entity", "review", "payment"],
-  "dot-audit-prep":      ["entity", "review", "payment"],
-  "dot-full-compliance": ["entity", "review", "payment"],
+  // Review-only intake: DOT#, name, email already collected at checkout.
+  // Admin handles the filing using the info from the order.
+  "mcs150-update":       ["review"],
+  "boc3-filing":         ["review"],
+  "ucr-registration":    ["review"],
+  "dot-registration":    ["review"],
+  "mc-authority":        ["review"],
+  "dot-drug-alcohol":    ["review"],
+  "dot-audit-prep":      ["review"],
+  "dot-full-compliance": ["review"],
 };
 
 // Category-gated dynamic steps. The Wizard inserts these after the `category`