feat: 初始化 ProStock 项目基础结构和配置

- 添加项目规则文档（开发规范、安全规则、配置管理）
- 实现数据模块核心功能（API 客户端、限流器、存储管理、配置加载）
- 添加 .gitignore 和 .kilocodeignore 配置
- 配置环境变量模板
- 编写 daily 模块单元测试

src/data/config.py

@@ -0,0 +1,33 @@
+"""Configuration management for data collection module."""
+from pathlib import Path
+from pydantic_settings import BaseSettings
+
+
+class Config(BaseSettings):
+    """Application configuration loaded from environment variables."""
+
+    # Tushare API token
+    tushare_token: str = ""
+
+    # Data storage path
+    data_path: Path = Path("./data")
+
+    # Rate limit: requests per minute
+    rate_limit: int = 100
+
+    # Thread pool size
+    threads: int = 2
+
+    class Config:
+        env_file = ".env.local"
+        env_file_encoding = "utf-8"
+        case_sensitive = False
+
+
+# Global config instance
+config = Config()
+
+
+def get_config() -> Config:
+    """Get configuration instance."""
+    return config