feat: 接入 DeepSeek AI 分析公告是否为中国电信可承接项目

- 新增 ai_enabled/ai_api_key/ai_base_url/ai_model 等配置项，通过 .env 管理
- 新增 app/services/ai_analyzer.py — DeepSeek API 调用 + 详情页正文提取
- 新增 extract_page_content() 从详情页抓取正文供 AI 分析
- Announcement 模型新增 ai_relevant / ai_analysis 字段
- 流水线集成 AI 分析步骤（关键词匹配后、通知前）
- AI 标记为可承接的项目额外发送 markdown 着重通知
- 创建 alembic 迁移版本 6e8f4c2d1b0a

app/config.py

@@ -1,5 +1,6 @@
 
 from pydantic_settings import BaseSettings, SettingsConfigDict
+from pydantic import field_validator
 
 
 class Settings(BaseSettings):
@@ -38,6 +39,40 @@ class Settings(BaseSettings):
     loghive_project: str = "gx-gp-notify"
     loghive_api_key: str = ""
 
+    # AI 分析 (DeepSeek)
+    ai_enabled: bool = False
+    ai_api_key: str = ""
+    ai_base_url: str = "https://api.deepseek.com/v1"
+    ai_model: str = "deepseek-chat"
+    ai_timeout: int = 30
+    ai_analysis_title: str = "🔔 中国电信可承接项目"
+    ai_prompt_template: str = (
+        "你是一个政府采购项目分析师，专门帮助中国电信识别可以承接的项目。\n\n"
+        "可承接范围包括但不限于：\n"
+        "- 通信工程、光缆建设、基站建设\n"
+        "- 信息化系统建设、系统集成\n"
+        "- 云计算、大数据、政务云\n"
+        "- 物联网、智慧城市、智慧园区\n"
+        "- 安防监控、视频会议、应急通信\n"
+        "- 网络运维、网络优化、IDC 服务\n"
+        "- 5G 应用、专线服务\n\n"
+        "--- 公告信息 ---\n"
+        "标题：{title}\n"
+        "采购人：{purchase_name}\n"
+        "公告类型：{announcement_type}\n\n"
+        "--- 公告正文 ---\n"
+        "{content}\n\n"
+        "请用 JSON 格式回答：\n"
+        '{{"is_relevant": true/false, "reason": "简要判断理由", "business_type": "业务分类"}}'
+    )
+
+    @field_validator("ai_prompt_template", mode="before")
+    @classmethod
+    def convert_newlines(cls, v: str) -> str:
+        """将 .env 中字面 \\n 转换为真实换行"""
+        if isinstance(v, str) and "\\n" in v:
+            return v.replace("\\n", "\n")
+        return v
 
     # 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"}}'  # noqa: E501