[Corpses] Add corpse entity variables to DB (#4911)

* [Corpses] Add corpse entity variables to DB

- When corpses have entity variables add/remove/modified it will update the database accordingly.
- Corpse loading will pull the database values if they exist.

* Updates per review

* Update version.h

---------

Co-authored-by: Chris Miles <akkadius1@gmail.com>

zone/corpse.cpp

@@ -32,7 +32,9 @@
 #include "../common/repositories/character_corpse_items_repository.h"
 #include <iostream>
 #include "queryserv.h"
+#include "../common/json/json.hpp"
 
+using json = nlohmann::json;
 
 extern EntityList           entity_list;
 extern Zone                *zone;
@@ -674,6 +676,21 @@ bool Corpse::Save()
 	ce.drakkin_tattoo   = drakkin_tattoo;
 	ce.drakkin_details  = drakkin_details;
 
+	{
+		json j;
+		for (const auto& kv : m_EntityVariables) {
+			j[kv.first] = kv.second;
+		}
+
+		if (!j.empty()) {
+			ce.entity_variables = j.dump();
+		} else {
+			ce.entity_variables = "{}";
+		}
+
+		LogCorpses("Corpse entity_variables: %s", ce.entity_variables.c_str());
+	}
+
 	for (auto &item: m_item_list) {
 		CharacterCorpseItemEntry e;
 
@@ -2428,9 +2445,36 @@ Corpse *Corpse::LoadCharacterCorpse(
 	c->m_become_npc                = false;
 	c->m_consented_guild_id        = cc.guild_consent_id;
 
+	try {
+		if (Strings::IsValidJson(cc.entity_variables)) {
+			json j = json::parse(cc.entity_variables);
+			for (auto& el : j.items()) {
+				c->SetEntityVariable(el.key(), el.value().get<std::string>());
+			}
+		}
+	} catch (const std::exception& ex) {
+		LogError("Failed to parse entity_variables JSON for corpse ID %u: %s", cc.id, ex.what());
+	}
+
 	c->IsRezzed(cc.is_rezzed);
 
 	c->UpdateEquipmentLight();
 
 	return c;
 }
+
+void Corpse::SyncEntityVariablesToCorpseDB()
+{
+	if (!m_is_player_corpse || m_corpse_db_id == 0) {
+		return;
+	}
+
+	json j;
+	for (const auto& [key, value] : m_EntityVariables) {
+		j[key] = value;
+	}
+
+	std::string serialized = j.dump();
+
+	CharacterCorpsesRepository::UpdateEntityVariables(database, m_corpse_db_id, serialized);
+}