Sync and bandwidth tracking issue

• Create diagnostics for tracking bandwidth contribution of each type of message with counts, uncompressed size, and estimated compressed size.
• Selective outcome transmission (#990)
• Limit block updates to in range clients (#382)
• Only send inventory changes instead of the whole inventory (#961)
  • Potentially, we could develop an abstraction for doing this type of partial sync for multiple components, e.g. character states
• Don't send the inventories of other entities (#960)
• Don't send empty update messages? (#47 (closed))
• Extra component removal messages (#911)
• Sync specific info for out of range group members (#856)
• On startup players without a position don't have certain things synced properly (#555 (closed))
• Consider implications of stealth on syncing