[16.0][FIX] base_maintenance: domain team_member_ids

[CristianoMafraJunior]

@Escodoo SO571-56

Summary

• Adds a team_member_ids related field on maintenance.request (derived from maintenance_team_id.member_ids) to expose the selected team's members to the view layer.
• Applies a domain on the Responsible (user_id) field in the maintenance request form so that, when a team is selected, only that team's members are listed as options.

Motivation

Previously the Responsible dropdown listed all internal users regardless of the selected team, making it easy to accidentally assign a request to someone outside the team. This change improves usability by scoping the selection to the relevant people.

cc @WesleyOliveira98 @marcelsavegnago @kaynnan