Document include=assets as the way to see a ticket's associated assets

The /tickets/{id}/associated-assets path 404s on this instance; assets come
back embedded via GET /tickets/{id}?include=assets. Spell out the full include
list on get_ticket and in the skill reference so consumers don't hunt for a
nonexistent endpoint.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

mcp-server/server.py

@@ -303,7 +303,11 @@ def list_ticket_statuses() -> str:
 
 @mcp.tool()
 def get_ticket(ticket_id: int, include: str | None = None) -> str:
-    """Get a ticket by id. `include` e.g. "conversations,requester,stats".
+    """Get a ticket by id. `include` accepts a comma-separated subset of:
+    conversations, requester, requested_for, stats, problem, assets, tags,
+    related_tickets. NOTE: include=assets is the ONLY way to see the ticket's
+    associated CMDB assets (a /tickets/{id}/associated-assets path does not
+    exist — it 404s); the assets come back embedded in the ticket object.
     Numeric enums come back with companion *_label fields (priority_label,
     status_label, impact_label, urgency_label) — use those names, never guess
     the scale (priority 4 is Urgent, not low)."""