build: go 1.24

We were running behind and there were quite some deprecations to update.
This was mostly in the upstream copy/pasta package but seems quite
minimal.

vendor/github.com/ProtonMail/go-crypto/openpgp/packet/config.go

@@ -173,6 +173,11 @@ type Config struct {
 	// weaknesses in the hash algo, potentially hindering e.g. some chosen-prefix attacks.
 	// The default behavior, when the config or flag is nil, is to enable the feature.
 	NonDeterministicSignaturesViaNotation *bool
+
+	// InsecureAllowAllKeyFlagsWhenMissing determines how a key without valid key flags is handled.
+	// When set to true, a key without flags is treated as if all flags are enabled.
+	// This behavior is consistent with GPG.
+	InsecureAllowAllKeyFlagsWhenMissing bool
 }
 
 func (c *Config) Random() io.Reader {
@@ -403,6 +408,13 @@ func (c *Config) RandomizeSignaturesViaNotation() bool {
 	return *c.NonDeterministicSignaturesViaNotation
 }
 
+func (c *Config) AllowAllKeyFlagsWhenMissing() bool {
+	if c == nil {
+		return false
+	}
+	return c.InsecureAllowAllKeyFlagsWhenMissing
+}
+
 // BoolPointer is a helper function to set a boolean pointer in the Config.
 // e.g., config.CheckPacketSequence = BoolPointer(true)
 func BoolPointer(value bool) *bool {