conflict-decisions: also apply dateOfDeath (D5 death-date resolutions)

god extended conflict-decisions.json with an optional dateOfDeath
(DD.MM.YYYY). apply_conflict_decisions now sets the animal's death date
(normalized) as authoritative when present — clearing D5 death-date
conflicts the same way genotype/farbschlag decisions are applied. No C#
change (death already flows to Gerbil.DateOfDeath). test_extract covers a
Flint dateOfDeath resolution. python green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tools/import/extract.py

@@ -862,6 +862,8 @@ def apply_conflict_decisions(merged, conflicts, path):
         if d.get("farbschlag"):
             a["farbschlag"] = d["farbschlag"]
             a["farbschlagVariants"] = [d["farbschlag"]]
+        if d.get("dateOfDeath"):                       # D5 death-date resolutions
+            a["death"] = norm_dob(d["dateOfDeath"])
         if a.get("conflict"):
             a["conflict"] = False
             conflicts[:] = [c for c in conflicts if c.get("id") != a["id"]]