chore: fix deprecated API usage in examples, update changelog

- batch_orders: use BatchCancelOrdersRequest::with_orders() instead of
  deprecated new()
- rfq_verify: use target_cost_dollars field instead of deprecated
  target_cost_as_dollars() method
- Expand changelog Deprecated section to cover all items aligned with
  kalshi_python_async v3.2.0

Author: pbeets

CHANGELOG.md

@@ -113,8 +113,18 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - `CreateOrderRequest::sell_position_floor()` — use `reduce_only` instead. Only
   accepts value of 0.
+- `Rfq::target_cost_as_dollars()` and `Quote::rfq_target_cost_as_dollars()` —
+  use the `target_cost_dollars` / `rfq_target_cost_dollars` fields directly.
+- `BatchCancelOrdersRequest::new()` and `try_new()` — use `with_orders()` /
+  `try_with_orders()` for per-order subaccount support.
 - `target_cost_centi_cents` on RFQ/Quote types — use `target_cost_dollars`
   instead.
+- `Order.queue_position` — always returns 0; use the `get_order_queue_position`
+  endpoint instead.
+- `Fill.price` and `Trade.price` — use `yes_price` / `no_price` instead.
+- `Fill.trade_id`, `Fill.market_ticker`, `Fill.ts` — legacy field names.
+- `Event.category` — use series-level category instead.
+- `MarketPosition.resting_orders_count` — deprecated by the API.
 
 ## [0.2.0] - 2026-01-18
 

examples/batch_orders.rs

@@ -10,9 +10,9 @@
 //! Run with: cargo run --example batch_orders
 
 use kalshi_trade_rs::{
-    Action, BatchCancelOrdersRequest, BatchCreateOrdersRequest, CreateOrderRequest,
-    GetMarketsParams, KalshiClient, KalshiConfig, MarketFilterStatus, OrderType, Side, TimeInForce,
-    cents_to_dollars,
+    Action, BatchCancelOrderItem, BatchCancelOrdersRequest, BatchCreateOrdersRequest,
+    CreateOrderRequest, GetMarketsParams, KalshiClient, KalshiConfig, MarketFilterStatus,
+    OrderType, Side, TimeInForce, cents_to_dollars,
 };
 use std::time::{SystemTime, UNIX_EPOCH};
 
@@ -171,7 +171,11 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
         println!("=== Batch Cancel Orders ===");
         println!("Canceling {} orders...", successful_order_ids.len());
 
-        let cancel_request = BatchCancelOrdersRequest::new(successful_order_ids.clone());
+        let cancel_items: Vec<BatchCancelOrderItem> = successful_order_ids
+            .iter()
+            .map(BatchCancelOrderItem::new)
+            .collect();
+        let cancel_request = BatchCancelOrdersRequest::with_orders(cancel_items);
         let cancel_response = client.batch_cancel_orders(cancel_request).await?;
 
         println!("\nBatch cancel results:");

examples/rfq_verify.rs

@@ -99,8 +99,9 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
                     let size = match rfq.contracts {
                         Some(c) if c > 0 => format!("{} contracts", c),
                         _ => rfq
-                            .target_cost_as_dollars()
-                            .map(|d| format!("${:.2} target", d))
+                            .target_cost_dollars
+                            .as_deref()
+                            .map(|d| format!("${} target", d))
                             .unwrap_or_else(|| "unknown size".to_string()),
                     };
                     println!(