feat: track and display WotLK server-authoritative combat stats

Adds update field tracking for WotLK secondary combat statistics:
- UNIT_FIELD_ATTACK_POWER / RANGED_ATTACK_POWER (fields 123, 126)
- PLAYER_DODGE/PARRY/BLOCK/CRIT_PERCENTAGE (fields 1025-1029)
- PLAYER_RANGED_CRIT_PERCENTAGE, PLAYER_SPELL_CRIT_PERCENTAGE1 (1030, 1032)
- PLAYER_FIELD_COMBAT_RATING_1 (25 slots at 1231, hit/expertise/haste/etc.)

Both CREATE_OBJECT and VALUES update paths now populate these fields.
The Character screen Stats tab shows them when received from the server,
with graceful fallback when not available (Classic/TBC expansions).

Field indices verified against AzerothCore 3.3.5a UpdateFields.h.

include/game/update_field_table.hpp

@@ -42,6 +42,10 @@ enum class UF : uint16_t {
     UNIT_FIELD_STAT4,         // Spirit
     UNIT_END,
 
+    // Unit combat fields (WotLK: PRIVATE+OWNER — only visible for the player character)
+    UNIT_FIELD_ATTACK_POWER,         // Melee attack power (int32)
+    UNIT_FIELD_RANGED_ATTACK_POWER,  // Ranged attack power (int32)
+
     // Player fields
     PLAYER_FLAGS,
     PLAYER_BYTES,
@@ -59,6 +63,15 @@ enum class UF : uint16_t {
     PLAYER_EXPLORED_ZONES_START,
     PLAYER_CHOSEN_TITLE,         // Active title index (-1 = no title)
 
+    // Player combat stats (WotLK: PRIVATE — float values)
+    PLAYER_BLOCK_PERCENTAGE,         // Block chance %
+    PLAYER_DODGE_PERCENTAGE,         // Dodge chance %
+    PLAYER_PARRY_PERCENTAGE,         // Parry chance %
+    PLAYER_CRIT_PERCENTAGE,          // Melee crit chance %
+    PLAYER_RANGED_CRIT_PERCENTAGE,   // Ranged crit chance %
+    PLAYER_SPELL_CRIT_PERCENTAGE1,   // Spell crit chance % (first school; 7 consecutive float fields)
+    PLAYER_FIELD_COMBAT_RATING_1,    // First of 25 int32 combat rating slots (CR_* indices)
+
     // GameObject fields
     GAMEOBJECT_DISPLAYID,