v1.1.0

What's changed

• Added a one-command xref run flow that builds the viewer without manual JSON pipeline steps.
• Preserved section bodies, anchors, schedules, and parent sections through parsing and resolution.
• Rendered safer structured viewer markup with working TOC anchors, hover panels, search, and external citation links.
• Fixed false internal references for external citations such as 17 U.S.C. Section 512.
• Added regression tests for reference resolution, viewer output, and no-fetch external citation links.