refactor: rename Aster-prefixed universal types to clean names

- AsterOrder → Order
- AsterAccountSnapshot → AccountSnapshot
- AsterAccountPosition → AccountPosition
- AsterAccountAsset → AccountAsset
- AsterDepthLevel → DepthLevel
- AsterDepth → Depth
- AsterTicker → Ticker
- AsterKline → Kline

These types are the platform-agnostic contract used by all 8 exchanges,
not Aster-specific. Renamed across 63 files.

tests/binance-depth-health-integration.test.ts

@@ -1,6 +1,6 @@
 import { afterEach, describe, expect, it, vi } from "vitest";
 import type { ExchangeAdapter } from "../src/exchanges/adapter";
-import type { AsterAccountSnapshot, AsterDepth, AsterKline, AsterOrder, AsterTicker } from "../src/exchanges/types";
+import type { AccountSnapshot, Depth, Kline, Order, Ticker } from "../src/exchanges/types";
 import { MakerPointsEngine } from "../src/strategy/maker-points-engine";
 
 const ORIGINAL_FETCH = globalThis.fetch;
@@ -12,13 +12,13 @@ class StubAdapter implements ExchangeAdapter {
     return false;
   }
 
-  watchAccount(_cb: (snapshot: AsterAccountSnapshot) => void): void {}
-  watchOrders(_cb: (orders: AsterOrder[]) => void): void {}
-  watchDepth(_symbol: string, _cb: (depth: AsterDepth) => void): void {}
-  watchTicker(_symbol: string, _cb: (ticker: AsterTicker) => void): void {}
-  watchKlines(_symbol: string, _interval: string, _cb: (klines: AsterKline[]) => void): void {}
+  watchAccount(_cb: (snapshot: AccountSnapshot) => void): void {}
+  watchOrders(_cb: (orders: Order[]) => void): void {}
+  watchDepth(_symbol: string, _cb: (depth: Depth) => void): void {}
+  watchTicker(_symbol: string, _cb: (ticker: Ticker) => void): void {}
+  watchKlines(_symbol: string, _interval: string, _cb: (klines: Kline[]) => void): void {}
 
-  async createOrder(): Promise<AsterOrder> {
+  async createOrder(): Promise<Order> {
     throw new Error("not implemented");
   }
 
@@ -26,7 +26,7 @@ class StubAdapter implements ExchangeAdapter {
   async cancelOrders(): Promise<void> {}
   async cancelAllOrders(): Promise<void> {}
 
-  async queryAccountSnapshot(): Promise<AsterAccountSnapshot | null> {
+  async queryAccountSnapshot(): Promise<AccountSnapshot | null> {
     return {
       canTrade: true,
       canDeposit: true,