Shared column schema: espn mbb team season roster schema

Columns shared verbatim across: espn_mbb_team_season_roster, espn_nba_team_season_roster.

Details

col_name	types	description
league	character	League slug.
team_id	character	ESPN team id.
season	integer	Season year.
athlete_id	character	ESPN athlete id.
ref	character	$ref URL to athlete-in-season detail.