Add chunk plan cache configuration and storage

internal/framework/pipeline/chunk_cache.go

@@ -0,0 +1,29 @@
+package pipeline
+
+import (
+	"fmt"
+	"strings"
+)
+
+type ChunkCacheMode string
+
+const (
+	ChunkCacheAuto    ChunkCacheMode = "auto"
+	ChunkCacheBypass  ChunkCacheMode = "bypass"
+	ChunkCacheRefresh ChunkCacheMode = "refresh"
+)
+
+func ParseChunkCacheMode(raw string) (ChunkCacheMode, error) {
+	mode := ChunkCacheMode(strings.TrimSpace(raw))
+	switch mode {
+	case ChunkCacheAuto, ChunkCacheBypass, ChunkCacheRefresh:
+		return mode, nil
+	default:
+		return "", fmt.Errorf("chunk cache mode %q is not supported", strings.TrimSpace(raw))
+	}
+}
+
+func (m ChunkCacheMode) Validate() error {
+	_, err := ParseChunkCacheMode(string(m))
+	return err
+}