perf: 翻译独立后台循环(1 篇/秒)+ Semaphore 1

之前 fetch_one_source 入库后立即调翻译(可能并发触发腾讯 TMT 限速)
改为独立 translation_loop 后台循环:
- 完全不和 RSS 抓取并行
- 1 篇/秒节拍(Semaphore 1 + sleep 1.0)
- 没活时空闲 5 秒再轮询
- pending/failed 都重试

scripts/_rebuild_test.py

@@ -0,0 +1,26 @@
+import os, paramiko, json
+PW = os.environ["REMOTE_PASS"]
+c = paramiko.SSHClient()
+c.set_missing_host_key_policy(paramiko.AutoAddPolicy())
+c.connect("207.57.129.228", port=19717, username="root", password=PW, timeout=15, allow_agent=False, look_for_keys=False)
+def run(cmd, t=15):
+    si, so, se = c.exec_command(cmd, timeout=t)
+    out = so.read().decode("utf-8", "replace")
+    err = se.read().decode("utf-8", "replace")
+    rc = so.channel.recv_exit_status()
+    if out: print(out, end="")
+    return out
+
+# pull + 重建 api
+run("cd /srv/news && sudo -u news git pull --rebase 2>&1 | tail -3")
+run("cd /srv/news && docker compose up -d --force-recreate --no-deps --build api 2>&1 | tail -5", t=120)
+import time
+time.sleep(6)
+
+# 登录 + 拉详情
+out = run("curl -s -X POST http://localhost/api/v1/auth/login -H 'Content-Type: application/json' -d '{\"username\":\"owner\",\"password\":\"Owner2026!\"}'")
+token = json.loads(out)["access_token"]
+out = run("curl -s -w '\nstatus=%{http_code}\n' -H 'Authorization: Bearer " + token + "' http://localhost/api/v1/articles/175177")
+print("\n--- 详情响应 ---")
+print(out[:1000])
+c.close()