feat(oauth): 允许替换已失效的活跃 OAuth 账号并同步 status_snapshot

- 活跃但 token 已过期或刷新失败的重复账号视为可替换
- 清除失效标记、刷新配额时同步更新 status_snapshot.oauth
- oauth_invalid 清除接口同时识别 invalid_at 与 invalid_reason 两种标记
- 批量导入任务状态区分 created_count / replaced_count，前端据此展示新增/替换统计
- 补充重复替换场景的集成测试，用量测试等待超时从 10s 提升到 30s 以适应并行压力

crates/aether-data/src/repository/provider_oauth.rs

@@ -87,6 +87,14 @@ pub fn build_provider_oauth_batch_task_status_payload(
         "processed": state.get("processed").and_then(serde_json::Value::as_i64).unwrap_or(0),
         "success": state.get("success").and_then(serde_json::Value::as_i64).unwrap_or(0),
         "failed": state.get("failed").and_then(serde_json::Value::as_i64).unwrap_or(0),
+        "created_count": state
+            .get("created_count")
+            .and_then(serde_json::Value::as_i64)
+            .unwrap_or(0),
+        "replaced_count": state
+            .get("replaced_count")
+            .and_then(serde_json::Value::as_i64)
+            .unwrap_or(0),
         "progress_percent": state
             .get("progress_percent")
             .and_then(serde_json::Value::as_i64)
@@ -154,6 +162,8 @@ mod tests {
             "processed": 2,
             "success": 1,
             "failed": 1,
+            "created_count": 0,
+            "replaced_count": 1,
             "progress_percent": 999,
             "error_samples": [
                 {"detail": "x"},
@@ -180,6 +190,14 @@ mod tests {
             payload.get("progress_percent").and_then(|v| v.as_i64()),
             Some(100)
         );
+        assert_eq!(
+            payload.get("created_count").and_then(|v| v.as_i64()),
+            Some(0)
+        );
+        assert_eq!(
+            payload.get("replaced_count").and_then(|v| v.as_i64()),
+            Some(1)
+        );
         assert_eq!(
             payload
                 .get("error_samples")