/**
 * Coerce a distilled Location `TagMap` (`{ [key]: string | undefined }`) into a
 * plain `Record<string, string>`, dropping any undefined values. Amazon
 * Location returns tags directly on every `Describe*` response, so this is the
 * single normalization used to feed `diffTags`/`hasAlchemyTags`.
 */
export const toTagRecord = (
  tags: { [key: string]: string | undefined } | undefined,
): Record<string, string> =>
  Object.fromEntries(
    Object.entries(tags ?? {}).filter(
      (entry): entry is [string, string] => typeof entry[1] === "string",
    ),
  );