policy: image signature verification support

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

vendor/github.com/go-openapi/analysis/internal/debug/debug.go

@@ -0,0 +1,30 @@
+// SPDX-FileCopyrightText: Copyright 2015-2025 go-swagger maintainers
+// SPDX-License-Identifier: Apache-2.0
+
+package debug
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"runtime"
+)
+
+var (
+	output = os.Stdout
+)
+
+// GetLogger provides a prefix debug logger
+func GetLogger(prefix string, debug bool) func(string, ...any) {
+	if debug {
+		logger := log.New(output, prefix+":", log.LstdFlags)
+
+		return func(msg string, args ...any) {
+			_, file1, pos1, _ := runtime.Caller(1)
+			logger.Printf("%s:%d: %s", filepath.Base(file1), pos1, fmt.Sprintf(msg, args...))
+		}
+	}
+
+	return func(_ string, _ ...any) {}
+}