IAV-1332/feat(teams-channels): orchestration occupancy checks and Teams binding upsert across agents
- Add orchestration agent-integration endpoints for teams-channels-in-use and teams-binding upsert.
- Add fetch-teams-channels-in-use helpers (Entra tid resolution, Graph team/channel normalization, in-use detection) and teams-wizard-binding-payload (Teams deep-link parsing + binding payload assembly).
- Extend Adan/Aqal wizards (integrations + notifications) and legal/public-tender Teams flows: connection modals, Teams config views, integration sections/cards/grid, and wizard stores/types to persist conversation vs notification channels and avoid cross-agent channel conflicts.
- Tweak CustomSelect behavior used by Teams channel pickers.