feat: configure ready outreach funnel limit

packages/api-contracts/src/config.ts

@@ -21,6 +21,7 @@ export const RateLimitConfigSchema = z.strictObject({
 export const RuntimeRedditConfigSchema = z.strictObject({
   prioritizeRecentPosts: z.boolean(),
   recentWindowMinutes: z.number(),
+  maxReadyCandidates: z.number().int().min(1).max(500),
 });
 export const RuntimeConfigSchema = z.strictObject({
   rateLimit: RateLimitConfigSchema,