[Data Buckets] Distributed Databucket Caching (#3500)

* [Data Buckets] Zone-Based Data Bucket Caching

# Notes
- Adds a data bucket cache so we're not needlessly hitting the database every time we need to read a data bucket value.

* Cleanup and unify GetData access patterns

* Cache work

* Push

* Add to cache when we fetch and do a db hit

* Handle bucket misses in cache

* Formatting

* Logging

* [Data Buckets] Zone-Based Data Bucket Caching

- Adds a data bucket cache so we're not needlessly hitting the database every time we need to read a data bucket value.

* Cleanup and unify GetData access patterns

* Cache work

* Push

* Add to cache when we fetch and do a db hit

* Handle bucket misses in cache

* Formatting

* Remove redundant fetches from cache since GetData does the same thing

* Push progress

* Distributed cache work

* Logging

* Fix issue with scoping where same named keys could return overlapping results

* Misses cache tweak, logging, comments

* Add bot, client, and NPC bucket methods to Lua.

---------

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

common/servertalk.h

@@ -286,6 +286,8 @@
 // player events
 #define ServerOP_PlayerEvent 0x5100
 
+#define ServerOP_DataBucketCacheUpdate 0x5200
+
 enum {
 	CZUpdateType_Character,
 	CZUpdateType_Group,
@@ -1820,6 +1822,11 @@ struct ServerSendPlayerEvent_Struct {
 	char cereal_data[0];
 };
 
+struct ServerDataBucketCacheUpdate_Struct {
+	uint32_t cereal_size;
+	char cereal_data[0];
+};
+
 struct ServerFlagUpdate_Struct {
 	uint32 account_id;
 	int16 admin;