custom stats-index-format that contain a number for versioning use case

[dblado]

I was trying to use a version number in my stats index like this:

stats-index-format = "my_index_2_2006-01-01"

but that produces an index named "my_index_10_2025-10-10"

package main

import (
	"fmt"
	"strings"
	"time"
)

func main() {
	t := time.Now().UTC()
	index := strings.ToLower(t.Format("my_index_2_2006-01-01")) // changes the 2 to the current month
	fmt.Print(index)
}

I don't believe it's possible to provide an escape sequence for a number using t.Format -- perhaps a potential enhancement would be to split stats-index-format in to 2 different settings and use something like this to accommodate that use case:

package main

import (
	"fmt"
	"time"
)

func main() {
	t := time.Now().UTC()
	index := fmt.Sprintf("my_index_2_%s", t.Format("2006-01-02"))
	fmt.Println(index)
}