Feature: Full citation span including plaintiff and parenthetical

[medelman17]

Problem

Citation spans only cover the core volume-reporter-page portion, not the full citation including case name, pin cite, and court/year parenthetical.

"Commonwealth v. Gibson, 561 A.2d 1240 (Pa.Super. 1992)"
                         ^^^^^^^^^^^^^^
                         current span only covers this

Users who want to mask or annotate full citations (e.g., replace with "[CITATION]") need the complete span from plaintiff through closing parenthetical.

Current Behavior

span.originalStart / span.originalEnd point only to the core citation text matched by the tokenizer pattern. Plaintiff/defendant, pin cites, and court/year parentheticals are parsed in the extractor but their positions aren't tracked.

Expected Behavior

Add a fullSpan field (or similar) that covers the entire citation from case name through closing parenthesis:

interface FullCaseCitation {
  span: Span           // core: "561 A.2d 1240"
  fullSpan?: Span      // full: "Commonwealth v. Gibson, 561 A.2d 1240 (Pa.Super. 1992)"
}

Use Cases

• Citation masking for ML dataset preparation
• Full-text annotation/highlighting
• Citation extraction for bibliography generation

Upstream Reference

Python eyecite #135

[medelman17]

Fixed (shipped before v0.4.0). fullSpan covers case name through closing parenthetical. Use useFullSpan: true in annotation.