```

feat(core): 添加大化县政府网采购公告数据表和相关功能

- 创建 dahuagov_announcements 表用于存储大化县政府网采购公告
- 添加相关索引以提高查询性能
- 实现 save_dahuagov_announcements、get_new_dahuagov_announcements
  和 mark_dahuagov_announcements_sent 方法
- 修改统计查询以包含大化县公告数据
- 更新内容哈希检查逻辑以支持新表

feat(cron): 集成大化县政府网采购公告爬取功能

- 导入大化县政府网爬虫模块
- 修改定时任务流程以同时爬取广西政府采购网和大化县政府网
- 对不同来源公告采用不同处理策略：
  - 广西政府采购网：关键词筛选后推送
  - 大化县政府网：全部推送，不过滤关键词
- 分别处理和统计两个来源的公告数据
- 实现独立的通知发送和状态更新机制

feat(notification): 优化企业微信通知显示大化县来源标识

- 为不同来源公告添加前缀标识（【大化县政府网】或【广西政府采购网】）
- 根据公告来源动态调整通知标题：
  - 单一来源显示具体来源
  - 双来源显示"双源监控"标识
- 改进通知卡片的来源区分度，便于用户识别公告来源
```

gx_gp_monitor/core/database.py

@@ -264,12 +264,32 @@ class DatabaseManager:
             FOREIGN KEY (source_code) REFERENCES announcement_sources(code)
         );
 
+        -- 大化县政府网采购公告表（全部推送，不筛选）
+        CREATE TABLE IF NOT EXISTS dahuagov_announcements (
+            id SERIAL PRIMARY KEY,
+            title VARCHAR(500) NOT NULL,
+            publish_date TIMESTAMP NOT NULL,
+            purchase_name VARCHAR(200),
+            content_url TEXT,
+            source_code VARCHAR(50) NOT NULL DEFAULT 'dahuagov',
+            source_name VARCHAR(100) NOT NULL DEFAULT '大化县政府网采购公告',
+            announcement_type VARCHAR(50) NOT NULL DEFAULT 'purchase',
+            crawled_at TIMESTAMP,
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            content_hash VARCHAR(32) UNIQUE,
+            is_new BOOLEAN DEFAULT TRUE
+        );
+
         -- 创建索引
         CREATE INDEX IF NOT EXISTS idx_announcements_publish_date ON announcements(publish_date DESC);
         CREATE INDEX IF NOT EXISTS idx_announcements_source_code ON announcements(source_code);
         CREATE INDEX IF NOT EXISTS idx_announcements_content_hash ON announcements(content_hash);
         CREATE INDEX IF NOT EXISTS idx_announcements_created_at ON announcements(created_at DESC);
         CREATE INDEX IF NOT EXISTS idx_crawl_results_crawled_at ON crawl_results(crawled_at DESC);
+        CREATE INDEX IF NOT EXISTS idx_dahuagov_publish_date ON dahuagov_announcements(publish_date DESC);
+        CREATE INDEX IF NOT EXISTS idx_dahuagov_content_hash ON dahuagov_announcements(content_hash);
+        CREATE INDEX IF NOT EXISTS idx_dahuagov_created_at ON dahuagov_announcements(created_at DESC);
 
         -- 创建更新时间触发器
         CREATE OR REPLACE FUNCTION update_updated_at_column()
@@ -704,6 +724,13 @@ class DatabaseManager:
                     COUNT(DISTINCT source_code) as sources,
                     MAX(crawled_at) as last_crawl
                 FROM manual_announcements
+                UNION ALL
+                SELECT
+                    'dahuagov_announcements' as table_name,
+                    COUNT(*) as count,
+                    COUNT(DISTINCT source_code) as sources,
+                    MAX(crawled_at) as last_crawl
+                FROM dahuagov_announcements
                 """
 
                 cursor.execute(detail_sql)
@@ -742,12 +769,14 @@ class DatabaseManager:
             SELECT content_hash FROM auto_announcements WHERE content_hash = %s
             UNION ALL
             SELECT content_hash FROM manual_announcements WHERE content_hash = %s
+            UNION ALL
+            SELECT content_hash FROM dahuagov_announcements WHERE content_hash = %s
         ) as combined_check LIMIT 1
         """
 
         try:
             with get_db_cursor() as cursor:
-                cursor.execute(sql, (content_hash, content_hash, content_hash))
+                cursor.execute(sql, (content_hash, content_hash, content_hash, content_hash))
                 return cursor.fetchone() is not None
         except Exception as e:
             logger.error(f"检查公告存在性失败: {str(e)}")
@@ -790,6 +819,133 @@ class DatabaseManager:
             logger.error(f"获取最近公告失败: {str(e)}")
             return []
 
+    @retry_on_exception(RetryConfig(max_retries=3))
+    def save_dahuagov_announcements(self, announcements: List[Announcement]) -> int:
+        """
+        保存大化县政府网公告（全部推送，不筛选关键词）
+
+        Args:
+            announcements: 公告列表
+
+        Returns:
+            int: 成功保存的新公告数量
+        """
+        if not self.config.database.enabled:
+            return 0
+
+        if not announcements:
+            return 0
+
+        # 为没有哈希的公告生成哈希
+        for announcement in announcements:
+            if not announcement.content_hash:
+                announcement.generate_content_hash()
+
+        sql = """
+        INSERT INTO dahuagov_announcements (
+            title, publish_date, purchase_name, content_url, source_code, source_name,
+            announcement_type, crawled_at, content_hash, is_new
+        ) VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s)
+        ON CONFLICT (content_hash) DO NOTHING
+        """
+
+        values = []
+        for announcement in announcements:
+            values.append((
+                announcement.title,
+                announcement.publish_date,
+                announcement.purchase_name,
+                announcement.content_url,
+                announcement.source_code,
+                announcement.source_name,
+                announcement.announcement_type.value,
+                announcement.crawled_at,
+                announcement.content_hash,
+                announcement.is_new
+            ))
+
+        try:
+            with get_db_cursor() as cursor:
+                extras.execute_batch(cursor, sql, values)
+                affected_rows = cursor.rowcount
+                logger.info(f"保存大化县公告完成，新增 {affected_rows} 条")
+                return affected_rows
+        except Exception as e:
+            logger.error(f"保存大化县公告失败: {str(e)}")
+            return 0
+
+    @retry_on_exception(RetryConfig(max_retries=3))
+    def get_new_dahuagov_announcements(self) -> List[Announcement]:
+        """
+        获取大化县未推送的新公告（is_new = TRUE）
+
+        Returns:
+            List[Announcement]: 未推送的公告列表
+        """
+        if not self.config.database.enabled:
+            return []
+
+        sql = """
+        SELECT * FROM dahuagov_announcements
+        WHERE is_new = TRUE
+        ORDER BY publish_date DESC
+        """
+
+        try:
+            with get_db_cursor() as cursor:
+                cursor.execute(sql)
+                rows = cursor.fetchall()
+
+                announcements = []
+                for row in rows:
+                    row_dict = dict(row)
+                    row_dict['announcement_type'] = AnnouncementType(row_dict['announcement_type'])
+                    announcements.append(Announcement.from_dict(row_dict))
+
+                return announcements
+        except Exception as e:
+            logger.error(f"获取大化县新公告失败: {str(e)}")
+            return []
+
+    @retry_on_exception(RetryConfig(max_retries=3))
+    def mark_dahuagov_announcements_sent(self, announcements: List[Announcement]) -> int:
+        """
+        标记大化县公告已发送（is_new = FALSE）
+
+        Args:
+            announcements: 已发送的公告列表
+
+        Returns:
+            int: 更新的记录数
+        """
+        if not self.config.database.enabled:
+            return 0
+
+        if not announcements:
+            return 0
+
+        # 获取所有公告的哈希值
+        hashes = [ann.content_hash for ann in announcements if ann.content_hash]
+
+        if not hashes:
+            return 0
+
+        sql = """
+        UPDATE dahuagov_announcements
+        SET is_new = FALSE, updated_at = CURRENT_TIMESTAMP
+        WHERE content_hash = ANY(%s)
+        """
+
+        try:
+            with get_db_cursor() as cursor:
+                cursor.execute(sql, (hashes,))
+                affected_rows = cursor.rowcount
+                logger.info(f"标记大化县公告已发送完成，更新 {affected_rows} 条")
+                return affected_rows
+        except Exception as e:
+            logger.error(f"标记大化县公告已发送失败: {str(e)}")
+            return 0
+
 
 # 全局数据库管理器实例
 _db_manager = None