add injured players to team's squad list

You were right that we already hold this — the squad endpoint was just the one place dropping it. Each player in GET /api/v2/teams/{id}/squad/ now comes back with availability, injury_type and injury_expected_return, the same three fields the player endpoints already return, so an injured flag is availability == "injured". It is a four-value status rather than a boolean (available, injured, doubtful, suspended) because folding doubtful and suspended into "not injured" would have misled anyone building a team-news view. One caveat worth knowing: the status comes from the team news published ahead of each side's next fixture, so "available" means the player is not currently listed as missing rather than confirmed fit, and a club with no upcoming fixture is not re-checked until it has one. That is written up on the Teams & players docs page. Existing fields are unchanged, so nothing you already parse breaks.