feat: a vault's settings come with the vault list, with no requests of their own

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

internal/provider/provider.go

@@ -93,6 +93,8 @@ type Container struct {
 	// secrets only.
 	Types []ObjectType
 	URL   string // web page for the container, if any
+	// Attrs describe it further, from the listing (a vault's settings).
+	Attrs []Attr `json:",omitempty"`
 }
 
 // ObjectTypes returns the container's object types, defaulting to secrets.