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/subscriber/tradesignal/override.go

@@ -0,0 +1,29 @@
+package tradesignal
+
+import "aiaa-notification-service/internal/config"
+
+func Apply(signal *Signal, override *config.StrategyOverride) *Signal {
+	if override == nil {
+		return signal
+	}
+
+	out := *signal
+	if signal.Quantity != nil {
+		q := *signal.Quantity
+		out.Quantity = &q
+	}
+
+	if out.Quantity != nil && *out.Quantity > 0 {
+		multiplier := override.QuantityMultiplierFor(out.Action)
+		if multiplier != 1 {
+			q := *out.Quantity * multiplier
+			out.Quantity = &q
+		}
+	}
+
+	if override.Leverage != nil && *override.Leverage > 0 {
+		out.Leverage = *override.Leverage
+	}
+
+	return &out
+}