feat(http): add support for schema boolean attribute index, to flag a symbol column as indexed (#1352)

fix migration of symbol maps

feat(ilp): fix various edge cases, behaviour of type parsers tcp/udp is closer, allow empty field value as null, support other types (#1312)

* fix(cairo): fix 6.0.6 migration

* fix(cairo): add migration tests with data from 6.0.5
add noop migration test from latest version to latest

chore(docs): add deployment doc links to main README, make core README software versions generic (#1354)

We create a buffer to hold "123" and then attempt to parse a geohash
7 chars in len. We have control over the first 3 chars, which parse
well, then the next 4 are random bytes which are unlikely to parse as
valid geohash chars in base 32.