Two divergences from the spec, both reported from a real corpus:

* `art. 360` with no code came back as `art.360`. Every procedural code has
  an art. 360, so an unqualified number is not a citation -- it files three
  different articles under one exact-match key, which is the one thing this
  field exists to prevent. The code suffix is now required.

* `d.p.r. 115/02` extracted as nothing, because the year was pinned to four
  digits. Two to four now, kept verbatim: expanding `02` to `2002` would
  split one act across two keys depending on the source's style.

The spec's prose allowed both readings; it now says which.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HXRMe9ZPUQCCCtBai9uqt3