feat: 创建 FastAPI 项目骨架（config + main + 依赖管理）

app/config.py

@@ -0,0 +1,44 @@
+from pydantic_settings import BaseSettings, SettingsConfigDict
+from typing import List
+
+
+class Settings(BaseSettings):
+    model_config = SettingsConfigDict(env_file=".env", env_file_encoding="utf-8")
+
+    # 应用
+    debug: bool = False
+    log_level: str = "INFO"
+
+    # 数据库
+    database_url: str = "postgresql+asyncpg://gx-gp-notify:password@localhost:5432/gx-gp-notify"
+
+    # 爬虫
+    crawler_base_url: str = "https://zfcg.gxzf.gov.cn"
+    crawler_keywords: List[str] = ["大化"]
+    crawler_max_pages: int = 10
+    crawler_timeout: int = 30
+    crawler_page_size: int = 100
+
+    # 企业微信
+    wechat_enabled: bool = True
+    wechat_corp_id: str = ""
+    wechat_agent_id: str = ""
+    wechat_secret: str = ""
+    wechat_token: str = ""
+    wechat_encoding_aes_key: str = ""
+    wechat_port: int = 18001
+    wechat_host: str = "0.0.0.0"
+
+    # 定时任务
+    scheduler_enabled: bool = True
+    scheduler_cron: str = "0 8,14,18 * * *"
+
+    # Markdown
+    markdown_enabled: bool = True
+    markdown_output_file: str = "onu.md"
+
+    # 公告来源（JSON 字符串，从环境变量读取）
+    announcement_sources: str = '{"ZcyAnnouncement1":{"category_id":66485,"name":"采购公告","type":"purchase"},"ZcyAnnouncement2":{"category_id":66485,"name":"结果公告","type":"result"},"ZcyAnnouncement3":{"category_id":66485,"name":"合同公告","type":"contract"},"ZcyAnnouncement4":{"category_id":66485,"name":"更正公告","type":"correction"},"ZcyAnnouncement5":{"category_id":66485,"name":"招标文件预公示","type":"pre_announcement"},"ZcyAnnouncement6":{"category_id":66485,"name":"单一来源公示","type":"single_source"},"ZcyAnnouncement7":{"category_id":66485,"name":"电子卖场公示","type":"electronic_market"},"ZcyAnnouncement10":{"category_id":66485,"name":"履约验收公示","type":"acceptance"},"ZcyAnnouncement11":{"category_id":66485,"name":"工程类公告","type":"engineering"},"ZcyAnnouncement20":{"category_id":66485,"name":"框架协议征集公告","type":"framework_agreement"},"ZcyAnnouncement21":{"category_id":66485,"name":"框架协议入围结果公告","type":"framework_result"},"ZcyAnnouncement23":{"category_id":66485,"name":"框架协议成交结果汇总公告","type":"framework_summary"},"61-266648":{"category_id":66485,"name":"采购意向公开","type":"intention"}}'
+
+
+settings = Settings()

app/main.py

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+import logging
+from contextlib import asynccontextmanager
+from fastapi import FastAPI
+from app.config import settings
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    logging.basicConfig(
+        level=getattr(logging, settings.log_level),
+        format="%(asctime)s [%(levelname)s] %(name)s: %(message)s",
+    )
+    yield
+
+
+app = FastAPI(
+    title="广西政府采购网公告监控系统",
+    version="2.0.0",
+    lifespan=lifespan,
+    docs_url="/docs" if settings.debug else None,
+    redoc_url=None,
+)
+
+
+@app.get("/health")
+async def health():
+    return {"status": "ok"}