feat(trade): re-enable all_executions across all SDKs

CHANGELOG.md

@@ -4,6 +4,25 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Added
+
+- **All languages:** `Execution` gains a `side` field (`OrderSide`) — the buy/sell direction of the fill, now returned by the `today_executions`, `history_executions`, and `all_executions` responses
+- **All languages:** attached order (take-profit / stop-loss) support for `submit_order` and `replace_order`
+  - New types: `AttachedOrderType` (`ProfitTaker` / `StopLoss` / `Bracket`), `AttachedOrderDetail`, `SubmitAttachedParams`, `ReplaceAttachedParams`
+  - `SubmitOrderOptions` / `ReplaceOrderOptions`: new `attached_params` field
+  - `GetTodayOrdersOptions`: new `is_attached` flag — when combined with `order_id`, treats `order_id` as an attached sub-order ID for lookup (has no effect without `order_id`)
+  - `Order` / `OrderDetail`: new `attached_orders: Vec<AttachedOrderDetail>` field
+  - New method `order_detail_attached(order_id)` — queries detail for an attached order by its own ID
+  - `order_detail` now accepts `GetOrderDetailOptions` (with optional `is_attached` flag) in addition to a plain order ID string
+  - `cancel_order` gains an `is_attached` flag to cancel an attached sub-order by its own order ID (Rust: `CancelOrderOptions`; Python: `is_attached` keyword arg; Node.js: optional `isAttached` param; C++/Java: `is_attached` overload/default parameter; C: new `lb_trade_context_cancel_order_attached`)
+
+### Breaking changes
+
+- **All languages:** `OrderDetail.charge_detail` is now `Option<OrderChargeDetail>` (previously non-optional). Attached orders return `null` for this field; callers must handle the absent case.
+- **C SDK:** `lb_order_detail_t` gains a new `has_charge_detail: bool` field before `charge_detail`. Existing binaries must be recompiled; code that reads `charge_detail` directly should check `has_charge_detail` first.
+
 ## [4.4.1] - 2026-07-22
 
 ### Changed

CLAUDE.md

@@ -50,6 +50,16 @@ When you add, remove, or change any `#[pyclass]`/`#[pymethods]` definitions in
 signatures, type annotations, and docstrings in sync with the Rust
 implementation.
 
+To build and install the Python SDK locally (from the `python/` directory):
+
+```bash
+maturin develop
+```
+
+`python/pyproject.toml` uses `dynamic = ["version"]` — maturin reads the
+version from `python/Cargo.toml` automatically. Do **not** add a hardcoded
+`version` field to `pyproject.toml`.
+
 ## After modifying the C SDK (`c/`)
 
 `c/csrc/include/longbridge.h` is **auto-generated** by `cbindgen` during the