Function parse_data_deps_header 

pub fn parse_data_deps_header(src: &str) -> Result<Vec<DataDep>, HeaderError>

Parse a plugin script’s @data_deps header. Returns the resolved dep list (always including DataDep::Status), HeaderError on malformed syntax or an unknown / reserved dep name.

Accepts:

• No header at all (defaults to [Status])
• Empty array (@data_deps = []) — same as no header
• Single-line (@data_deps = ["status", "usage"])
• Multi-line across multiple // comment lines
• Trailing commas
• Single or double quotes around each name