0.1.0

Pin syn to 3 in http-request-schema-macros

MJT-74: the derives hand syn types to types-reader; with syn = "*" they can
end up on a different syn major than types-reader in a service's tree and
stop compiling. Same pin as types-reader (MJT-71).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>