feat: implement core backend architecture and project management services for the History API

pkg/cache/keys.go

@@ -0,0 +1,22 @@
+package cache
+
+import (
+	"strconv"
+
+	"github.com/cespare/xxhash/v2"
+
+	"history-api/pkg/jsonx"
+)
+
+func Key(prefix, id string) string {
+	return prefix + ":" + id
+}
+
+func Key2(prefix, first, second string) string {
+	return prefix + ":" + first + ":" + second
+}
+
+func QueryKey(prefix string, params any) string {
+	data, _ := jsonx.Marshal(params)
+	return prefix + ":" + strconv.FormatUint(xxhash.Sum64(data), 16)
+}