Add outreach rejection reasons tab

packages/api-contracts/src/outreach.ts

@@ -72,6 +72,10 @@ export const OutreachFunnelResponseSchema = z.strictObject({
     sent: z.number().int().nonnegative(),
     rejected: z.number().int().nonnegative(),
   }),
+  rejectionReasons: z.array(z.strictObject({
+    reason: z.string(),
+    count: z.number().int().positive(),
+  })).default([]),
   oldestActiveAt: z.number().nullable(),
   candidates: z.array(OutreachCandidateSchema),
 });