Eliminate 7 day vote check "optimization" and always use full vote history to...

Eliminate 7 day vote check "optimization" and always use full vote history to compute latest vote because it can be computed with an index-only scan (when the account hasn't voted in last 7 days, this is about 100x faster compare to the 7 day check and is just as fast even when account has voted very recently). This should dramatically lower the load on hivemind.