Add story-to-pack research and a structured situation review

Research toward building a content pack from a story corpus, kept on its own
branch and independent of the game. Records the selection experiments against
blind labels, and settles selection as gate G2 followed by a human review:
review.py writes REVIEW.md and a review.json form, apply_review.py checks the
filled form and writes situations.json for the next stage.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01C6UDQ9o6L6Ey173U7XVou6

tools/story-to-pack/probe/recover-result.json

@@ -0,0 +1,42 @@
+{
+ "B": {
+  "accepted": 4,
+  "precision1plus": 1.0,
+  "precision2": 0.0,
+  "label2": 0,
+  "distinct_situations": 4,
+  "repeated_names": 0,
+  "coverage": 0.13007159904534607,
+  "scenes_in_several": 0
+ },
+ "M1": {
+  "accepted": 4,
+  "precision1plus": 1.0,
+  "precision2": 0.0,
+  "label2": 0,
+  "distinct_situations": 4,
+  "repeated_names": 0,
+  "coverage": 0.13007159904534607,
+  "scenes_in_several": 0
+ },
+ "M2": {
+  "accepted": 3,
+  "precision1plus": 1.0,
+  "precision2": 1.0,
+  "label2": 3,
+  "distinct_situations": 3,
+  "repeated_names": 0,
+  "coverage": 0.05489260143198091,
+  "scenes_in_several": 0
+ },
+ "M3": {
+  "accepted": 16,
+  "precision1plus": 0.6875,
+  "precision2": 0.0,
+  "label2": 0,
+  "distinct_situations": 10,
+  "repeated_names": 1,
+  "coverage": 0.45465393794749404,
+  "scenes_in_several": 68
+ }
+}