1.3.0-rc.56

For sources using JDBC connector (s3, snowflake, mysql) append partition keys to response.
new table GET response includes set of partition/primary/sort/index keys.
existing clients expecting partition_keys array should not break as it is backwards compatible.

"keys":
{
"partition":
[],
"primary":
[
{
"name": "PRIMARY",
"fields":
[
"id"
]
}
],
"sort":
[],
"index":
[]
},