1.0.0

Added

• SecurityTxt.parse/1 for RFC 9116 parsing and validation with structured diagnostics separated into errors, recommendations, and notifications.
• SecurityTxt.serialize/1 for canonical unsigned document generation from a validated keyword list.
• Parsing and validation for Contact, Expires, Acknowledgments, Canonical, CSAF, Encryption, Hiring, Policy, and Preferred-Languages with source-order field preservation and convenience accessors.
• OpenPGP cleartext envelope detection and dash-unescaped body extraction without a cryptography dependency.
• Stable diagnostic codes with messages and one-based source line numbers.
• Physical-line scanning with UTF-8 BOM rejection, LF and CRLF support, and bounded resource limits for file size, line count, and field length.
• URI scheme validation for registered fields, RFC 3339 expiry classification, and RFC 5646 language-tag checks.
• Shared language-neutral conformance fixtures, property-based tests, and timestamped real-world snapshots from Google, GitHub, Microsoft, and Dropbox.
• Hex package metadata, ExDoc documentation, and CI across Elixir 1.14–1.20 on Ubuntu, macOS, and Windows.