Avoid repeated prompt metadata lookups

internal/configuration/resources.go

@@ -76,9 +76,10 @@ func (state *loaded) InspectPrompt(ctx context.Context, id string) (*PromptResou
 	result := &PromptResource{ID: id, Hash: entry.hash, DefaultProfile: raw.DefaultProfile, Description: raw.Description, SessionID: raw.SessionID}
 	if raw.Inputs != nil {
 		inputs := make([]PromptInputResource, len(raw.Inputs))
+		presence := state.promptMetadata[id]
 		for i, input := range raw.Inputs {
 			inputs[i] = PromptInputResource{Name: input.Name, ContentType: input.ContentType, Description: input.Description}
-			if state.promptMetadata[id][i].required == fieldValue {
+			if presence[i].required == fieldValue {
 				required := input.Required
 				inputs[i].Required = &required
 			}