data: refresh harvested part hashes (18 -> 19 known)

Re-running walker/harvest_hashes.py over the current 6 saves picks up
walker_compCrew_Medium_Wood_1x2_epb, which the previously committed
table predated.

extracted/definition_hashes_known.json

@@ -1,6 +1,6 @@
 {
   "_note": "Per-part hashes harvested from walker saves. CompartmentHash is also computed offline from CompartmentsDatabase (CompartmentHash_computed, authoritative). DefinitionHash is server-sourced and only known for parts that appear in a save \u2014 build a part in-game and re-run this to capture it.",
-  "definition_known": 18,
+  "definition_known": 19,
   "total_parts_in_db": 126,
   "parts": {
     "walker_compCaptainCrew_Wood_1x1_epb": {
@@ -70,6 +70,13 @@
       "CompartmentHash_history": [],
       "CompartmentHash_computed": "C341E8B3679D9E06C110F0E04045F1E5"
     },
+    "walker_compCrew_Medium_Wood_1x2_epb": {
+      "DefinitionHash": "5A8DB326E5E77B756218B45711A8104F",
+      "DefinitionHash_history": [],
+      "CompartmentHash": "9B219D6F887F9CB6CBA05A4AFAE1A685",
+      "CompartmentHash_history": [],
+      "CompartmentHash_computed": "9B219D6F887F9CB6CBA05A4AFAE1A685"
+    },
     "walker_compDeck_Square_Frame_1x1_epb": {
       "DefinitionHash": "97218AB6D0FDA2F5792DBCBBFD03798C",
       "DefinitionHash_history": [],