Recreate word table when refreshing counts #3328
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The counting touches a large part of the word table, leaving bloated tables and indexes. Thus recreate the table instead and swap it in.
This was referenced Feb 5, 2024
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When updating the frequency counts for words in the word table, the entries in the table have been simply updated until now. This is potentially expensive when it clashes with vacuuming (see #3315) and leaves a heavily bloated table.
Change the algorithm to create a new word table and switch out the old table.
For the planet this brings down the table size for the word table from 15GB to 8GB.