Yuri Astrakhan 0fce9641c0

A few cleanups on tile hashing (#861) ...

* Rename `global_hash` to `agg_tiles_hash`

This is still a big sticking point: what should be the name for the
metadata key for this value? The value represents the hash of all
`z,x,y,tile` over all rows of the `tiles` table (or view). Should it
include `md5` in its name, or should the hash be auto-detected by its
length? (details in #856)

* Generate it based on `tiles` table/view
* validate or generate, but not both (it will always fail otherwise)
* break up logic for per-tile, total, and integrity checks
* delete unused sqlx prep file

2023-09-05 16:25:59 -04:00

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