Update plans router to match Vultr API v2 query parameters

- Rename plan_type parameter to type with Query alias
- Increase default per_page from 25 to 500

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

server/routers/plans.py

@@ -10,27 +10,27 @@ router = APIRouter()
 
 @router.get("")
 async def list_plans(
-    plan_type: Optional[str] = None,  # vc2, vhf, vdc, etc.
+    type: Optional[str] = Query(None, alias="type"),
-    per_page: int = Query(25, le=500),
+    per_page: int = Query(500, le=500),
     cursor: Optional[str] = None,
     client: VultrClient = Depends(get_client)
 ):
     """List all cloud compute plans"""
-    return client.plans.list(plan_type=plan_type, per_page=per_page, cursor=cursor)
+    return client.plans.list(plan_type=type, per_page=per_page, cursor=cursor)
 
 
 @router.get("/all")
 async def list_all_plans(
-    plan_type: Optional[str] = None,
+    type: Optional[str] = Query(None, alias="type"),
     client: VultrClient = Depends(get_client)
 ):
     """List all cloud compute plans (auto-paginated)"""
-    return {"plans": client.plans.list_all(plan_type=plan_type)}
+    return {"plans": client.plans.list_all(plan_type=type)}
 
 
 @router.get("/bare-metal")
 async def list_bare_metal_plans(
-    per_page: int = Query(25, le=500),
+    per_page: int = Query(500, le=500),
     cursor: Optional[str] = None,
     client: VultrClient = Depends(get_client)
 ):