Add archive storage path configuration

internal/artifacts/run_id.go

@@ -0,0 +1,30 @@
+package artifacts
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"fmt"
+	"io"
+	"time"
+)
+
+// NewRunID returns a run ID in format: YYYYMMDDTHHMMSSZ-xxxxxxxx.
+func NewRunID() (string, error) {
+	return NewRunIDWith(time.Now().UTC(), rand.Reader)
+}
+
+// NewRunIDWith returns a run ID in format: YYYYMMDDTHHMMSSZ-xxxxxxxx
+// using an injected timestamp and randomness source.
+func NewRunIDWith(now time.Time, random io.Reader) (string, error) {
+	if random == nil {
+		random = rand.Reader
+	}
+
+	var suffix [4]byte
+	if _, err := io.ReadFull(random, suffix[:]); err != nil {
+		return "", fmt.Errorf("generate run id random suffix: %w", err)
+	}
+
+	ts := now.UTC().Format("20060102T150405Z")
+	return ts + "-" + hex.EncodeToString(suffix[:]), nil
+}