feat: add safe growth report persistence and AvalAI client

internal/growthreport/service.go

@@ -0,0 +1,13 @@
+package growthreport
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+)
+
+func RequestHash(merchantID int64, terminalID string, refresh bool) string {
+	sum := sha256.Sum256([]byte(fmt.Sprintf("%d\x00%s\x00%t", merchantID, terminalID, refresh)))
+	return hex.EncodeToString(sum[:])
+}
+