feat: queues have default team, tickets inherit it

- team_id on queues table (optional, can be overridden per-ticket)
- Ticket creation auto-sets team_id from the queue's default
- Queue admin form has team selector (scrip flow node 03)
- Queue API (POST/PATCH) accepts team_id

No enforcement — just a helpful default. Teams and queues
are loosely coupled, not hierarchically locked.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

drizzle/migrations/0007_flimsy_roughhouse.sql

@@ -0,0 +1,2 @@
+ALTER TABLE "queues" ADD COLUMN "team_id" uuid;--> statement-breakpoint
+ALTER TABLE "queues" ADD CONSTRAINT "queues_team_id_teams_id_fk" FOREIGN KEY ("team_id") REFERENCES "public"."teams"("id") ON DELETE set null ON UPDATE no action;