Character Appearance Phase 1 Done

Bump appearance payloads to version 2 and add `morphRegions` and `facialBoneMorphs` capture, serialization, and proxy application. Also fix head-part syncing when sender and proxy counts differ by reallocating the proxy array instead of deferring the whole list, and update the Python harness and protocol docs to match.

protocol/packets.md

@@ -74,7 +74,7 @@ Example after server processing:
     { "slot": "headband", "formId": "" }
   ],
   "appearance": {
-    "version": 1,
+    "version": 2,
     "raceFormId": "00013746",
     "height": 1.0,
     "morphWeight": { "thin": 0.0, "muscular": 0.0, "large": 0.0 },
@@ -82,7 +82,9 @@ Example after server processing:
     "hairColorFormId": "",
     "facialHairColorFormId": "",
     "headParts": [],
-    "morphs": []
+    "morphs": [],
+    "morphRegions": [],
+    "facialBoneMorphs": []
   },
   "serverTime": 1780212128.3011043
 }
@@ -160,7 +162,7 @@ receivers keep the proxy's existing/default body and face. When present, it is a
 best-effort snapshot for male-proxy-compatible runtime visuals:
 
 ```text
-version               Appearance payload version. Current value is 1.
+version               Appearance payload version. Current value is 2.
 raceFormId            Hex-string race form ID captured for diagnostics/future use; receivers do not switch proxy race yet.
 height                NPC height scalar.
 morphWeight           Body triangle weights: thin, muscular, and large.
@@ -169,8 +171,14 @@ hairColorFormId       Hex-string `CLFM` form ID for hair color, or empty when un
 facialHairColorFormId Hex-string `CLFM` form ID for facial hair color, or empty when unavailable.
 headParts             Hex-string `HDPT` form IDs for the sender's current head parts.
 morphs                Morph slider values as `{ "id": hex-string, "value": number }` entries.
+morphRegions          Region morph slider values as a flat array of numbers (added in version 2).
+facialBoneMorphs      Bone-based facial morphs as `{ "id": hex-string, "position": [x,y,z], "rotation": [x,y,z], "scale": [x,y,z] }` entries (added in version 2).
 ```
 
+`morphRegions` and `facialBoneMorphs` are optional and additive. Version 1
+senders omit them; receivers must treat their absence as "no change" and keep
+existing proxy morph data.
+
 Receivers must treat missing or malformed appearance subfields as non-fatal and
 apply only the parts they can resolve locally. Gender is intentionally not part
 of this payload yet; female proxy support can add it later.