feat: add synchronization statistics logging

- Initialize statistics logging in the mirror script
- Update logging to include total, processed, skipped, success, and failed repositories
- Enhance summary report with detailed statistics after synchronization

This commit introduces a comprehensive logging mechanism for the
repository synchronization process. It tracks various metrics such as
total repositories, processed repositories, and their success or failure
status. This enhancement provides better visibility into the
synchronization process and helps in debugging and monitoring.

main.sh

@@ -15,7 +15,6 @@ NC='\033[0m'
 # 初始化日志
 init_logging() {
     mkdir -p "$LOG_DIR"
-    LOG_FILE="$LOG_DIR/mirror-$(date '+%Y%m%d-%H%M%S').log"
     exec 1> >(tee -a "$LOG_FILE")
     exec 2> >(tee -a "$LOG_FILE" >&2)
 }
@@ -49,7 +48,8 @@ main() {
         "$GITEA_USER" \
         "$GITEA_TOKEN" \
         "$WORK_DIR" \
-        "$SKIP_REPOS"
+        "$SKIP_REPOS" \
+        "$STATS_FILE"
 
     mirror_exit_code=$?
 
@@ -57,11 +57,37 @@ main() {
     summary="GitHub to Gitea 同步报告
 
 运行时间: $(date '+%Y-%m-%d %H:%M:%S')
-同步状态: $([ $mirror_exit_code -eq 0 ] && echo "成功" || echo "失败")
 
 详细日志:
 $(cat "${LOG_FILE}")"
 
+    if [ -f "$STATS_FILE" ]; then
+        stats=$(cat "$STATS_FILE")
+        summary="GitHub to Gitea 同步报告
+
+    开始时间: $(echo "$stats" | jq -r '.start_time')
+    结束时间: $(echo "$stats" | jq -r '.end_time')
+    同步状态: $([ $mirror_exit_code -eq 0 ] && echo "成功" || echo "失败")
+
+    统计信息:
+    - 总仓库数: $(echo "$stats" | jq -r '.total_repos')
+    - 处理数量: $(echo "$stats" | jq -r '.processed')
+    - 成功数量: $(echo "$stats" | jq -r '.success')
+    - 失败数量: $(echo "$stats" | jq -r '.failed')
+    - 跳过数量: $(echo "$stats" | jq -r '.skipped')
+
+    跳过的仓库:
+    $(echo "$stats" | jq -r '.details.skipped_repos[]' | sed 's/^/- /')
+
+    失败的仓库:
+    $(echo "$stats" | jq -r '.details.failed_repos[]' | sed 's/^/- /')
+
+    详细日志 (最后 50 行):
+    $(tail -n 50 "$LOG_FILE")"
+    else
+        summary="无法获取同步统计信息"
+    fi
+
     # 如果启用了邮件通知，调用 mail.sh
     if [ "$ENABLE_MAIL" = "true" ]; then
         subject="GitHub 同步$([ $mirror_exit_code -eq 0 ] && echo "成功" || echo "失败") - $(date '+%Y-%m-%d')"