feat: add update score function & update schema

internal/models/result.go

@@ -5,13 +5,13 @@ import "time"
 type Result int32
 
 const (
-    NotTested               Result = 0
-    Testing                 Result = 1
-    Accepted                Result = 2
+    Testing                 Result = 0
+    NotTested               Result = 1
+    SystemFailDuringTesting Result = 2
     TimeLimitExceeded       Result = 3
     MemoryLimitExceeded     Result = 4
     CompilationError        Result = 5
-    SystemFailDuringTesting Result = 6
+    Accepted                Result = 6
 )
 
 func (result Result) Valid() error {