Fetching user's osmo balance from edge occasionally taking 800ms

[ValarDragon]

In network traces, I routinely see the following query taking 800ms, and appearing to block things about page load. Faster refreshes get 300ms.

https://app.osmosis.zone/api/edge-trpc-assets/assets.getUserAsset?batch=1&input=%7B%220%22%3A%7B%22json%22%3A%7B%22findMinDenomOrSymbol%22%3A%22OSMO%22%2C%22userOsmoAddress%22%3A%{OSMO_ADDRESS}%22%7D%7D%7D

Can we keep this value locally written to a file (e..g we cache all address / osmo amount pairs), and when this query is needed, we first return the local value, and then later get it from cache.

Also perhaps we should just do a direct RPC or SQS call to get a user's osmo amount, since this query is oddly slow on edge.