Add TeamRegistry and CronRegistry in crates/runtime/src/team_cron_registry.rs
and wire them into the 5 team+cron tool handlers in crates/tools/src/lib.rs.
Runtime additions:
- TeamRegistry: create/get/list/delete(soft)/remove(hard), task_ids tracking,
TeamStatus (Created/Running/Completed/Deleted)
- CronRegistry: create/get/list(enabled_only)/delete/disable/record_run,
CronEntry with run_count and last_run_at tracking
Tool wiring:
- TeamCreate: creates team in registry, assigns team_id to tasks via TaskRegistry
- TeamDelete: soft-deletes team with status transition
- CronCreate: creates cron entry with real cron_id
- CronDelete: removes entry, returns deleted schedule info
- CronList: returns full entry list with run history
8 new tests (team + cron) — all passing.
c486ca6692