Update: Metadata is included by default, Add: exclude_data arg to exclude meta_data

[pk-zipstack]

What

• Made meta_data available by default and introduced a --exclude_metadata flag to allow users to opt out of metadata inclusion in API requests.

Why

• Previously, metadata inclusion was controlled by an --include_metadata flag, which defaulted to False. The new flag ensures that metadata is included by default, aligning with expected behaviour and simplifying usage.

How

• Replaced the --include_metadata flag with the --exclude_metadata flag.
• Updated logic to default metadata inclusion to True unless explicitly overridden by the new flag.
• Adjusted documentation and help text to reflect the change.

Can this PR break any existing features. If yes, please list possible items. If no, please explain why. (PS: Admins do not merge the PR without this section filled)

• No, but the users who are using --include_metadata as a argument may face issues.