添加 USDT-M 合约数据支持（配置层 + 清理多余字段）

- 配置层：env.yaml 新增 binance_futures API Key 段，validators + config 同步
- 清理 TradingPair 实体：删除 kline_interval、kline_intervals、kline_synthesis_enabled
- 删除 fetchKlines 系列函数的 interval 参数，硬编码为 1m
- 更新 SQL seed 数据、example、base_rest 接口、types 接口
- 新增 AGENTS/08-boundaries.md 执行纪律
- 新增 PLAN-add-futures-data.md 方案文档

data/config/validators.ts

@@ -34,7 +34,10 @@ export interface RedisConfig {
 
 /** 交易所 API 密钥配置（按交易所 ID 索引） */
 export interface ExchangeConfig {
+    /** 现货市场 API Key */
     binance: ExchangeApiKeys;
+    /** USDT-M 永续合约 API Key */
+    binance_futures: ExchangeApiKeys;
     // 未来扩展：okx、bybit 等
     [exchangeId: string]: ExchangeApiKeys | undefined;
 }
@@ -105,6 +108,15 @@ export function validateConfig(raw: unknown): EnvConfig {
     const binanceApiKey = assertString(binanceObj["api_key"], "exchange.binance.api_key");
     const binanceApiSecret = assertString(binanceObj["api_secret"], "exchange.binance.api_secret");
 
+    // --- binance_futures ---
+    const binanceFutures = exObj["binance_futures"];
+    if (typeof binanceFutures !== "object" || binanceFutures === null) {
+        throw new Error("[config] env.yaml exchange 缺少 binance_futures 配置");
+    }
+    const futuresObj = binanceFutures as Record<string, unknown>;
+    const futuresApiKey = assertString(futuresObj["api_key"], "exchange.binance_futures.api_key");
+    const futuresApiSecret = assertString(futuresObj["api_secret"], "exchange.binance_futures.api_secret");
+
     // --- logging ---
     const logging = obj["logging"];
     if (typeof logging !== "object" || logging === null) {
@@ -132,6 +144,10 @@ export function validateConfig(raw: unknown): EnvConfig {
                 api_key: binanceApiKey,
                 api_secret: binanceApiSecret,
             },
+            binance_futures: {
+                api_key: futuresApiKey,
+                api_secret: futuresApiSecret,
+            },
         },
         logging: {
             level: logLevel,