Add time import to ClickHouse storage module (#76)

### TL;DR

Added time package import to clickhouse.go file.

### What changed?

The `time` package from the Go standard library has been imported in the `internal/storage/clickhouse.go` file.

### How to test?

No specific testing is required for this change as it's an import addition. However, ensure that the build process completes successfully and that any existing tests pass without errors.

### Why make this change?

The addition of the `time` package import suggests that time-related functionality will be used in the clickhouse storage implementation. This could be for handling timestamps, durations, or other time-based operations within the storage layer.

Author: iuwqyir

internal/storage/clickhouse.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"math/big"
 	"strings"
+	"time"
 
 	"github.com/ClickHouse/clickhouse-go/v2"
 	"github.com/ClickHouse/clickhouse-go/v2/lib/driver"