feat(tester): add solution endpoints

add CreateSolution&GetSolution&ListSolutions endpoints

internal/models/solution.go

@@ -15,3 +15,36 @@ type Solution struct {
 	UpdatedAt     time.Time `db:"updated_at"`
 	CreatedAt     time.Time `db:"created_at"`
 }
+
+type SolutionCreation struct {
+	Solution      string
+	TaskId        int32
+	ParticipantId int32
+	Language      int32
+	Penalty       int32
+}
+
+type SolutionsListItem struct {
+	Id            int32     `db:"id"`
+	TaskId        int32     `db:"task_id"`
+	ContestId     int32     `db:"contest_id"`
+	ParticipantId int32     `db:"participant_id"`
+	State         int32     `db:"state"`
+	Score         int32     `db:"score"`
+	Penalty       int32     `db:"penalty"`
+	TotalScore    int32     `db:"total_score"`
+	Language      int32     `db:"language"`
+	UpdatedAt     time.Time `db:"updated_at"`
+	CreatedAt     time.Time `db:"created_at"`
+}
+
+type SolutionsFilter struct {
+	Page          int32
+	PageSize      int32
+	ContestId     *int32
+	ParticipantId *int32
+	TaskId        *int32
+	Language      *int32
+	State         *int32
+	Order         *int32
+}