feat: subscribe to RabbitMQ trade signals and notify by rules

Consume configurable queues, format signals (including period), share NotifyService with HTTP, and drop duplicate bodies within 1h.

internal/cache/redis.go

@@ -175,3 +175,15 @@ func (c *Cache) CheckRateLimit(ctx context.Context, sourceID int, limitPerSec in
 func (c *Cache) Close() error {
 	return c.rdb.Close()
 }
+
+func dedupKey(hash string) string {
+	return "notify:dedup:" + hash
+}
+
+func (c *Cache) ClaimDedup(ctx context.Context, hash string, ttl time.Duration) (bool, error) {
+	return c.rdb.SetNX(ctx, dedupKey(hash), "1", ttl).Result()
+}
+
+func (c *Cache) ReleaseDedup(ctx context.Context, hash string) error {
+	return c.rdb.Del(ctx, dedupKey(hash)).Err()
+}