feat: implement sql_describe
Summary
- feat: implement sql_describe
sql_describe provides information about the query needed by pgproto. For instance, this allows us to get the format of the query output in a convenient form without executing the query.
Ensure that
-
New code is covered by tests - [internal feature] API is documented
- [internal feature] Changelog is up to date
- [internal feature] (if Lua API changed) Lua API version is bumped in
luamod.rs
- [internal feature] (if necessary) A follow-up doc issue is created in [picodata/docs] and linked here