feat: add ticket solution closure loop

backend/apps/solutions/api.py

@@ -7,6 +7,7 @@ from apps.solutions.schemas import (
     SolutionOut,
     TicketSolutionLinkIn,
     TicketSolutionLinkOut,
+    TicketSolutionOut,
 )
 from apps.tickets.models import Ticket
 
@@ -38,6 +39,25 @@ def list_solutions(request, status: str | None = None):
     return queryset[:100]
 
 
+@router.get("/tickets/{ticket_id}", response=list[TicketSolutionOut])
+def list_ticket_solutions(request, ticket_id: int):
+    require_permission(request, "solution.view")
+    queryset = TicketSolutionLink.objects.select_related("solution", "ticket").filter(
+        ticket_id=ticket_id
+    )
+    return [
+        {
+            "id": link.id,
+            "ticket_id": link.ticket_id,
+            "solution_id": link.solution_id,
+            "link_type": link.link_type,
+            "solution": link.solution,
+            "created_at": link.created_at,
+        }
+        for link in queryset
+    ]
+
+
 @router.get("/{solution_id}", response=SolutionOut)
 def get_solution(request, solution_id: int):
     require_permission(request, "solution.view")