docs(us2): Soft Serve → Gitea 迁移事实与参考镜像 (Plane VPS-94)

- hosts/us2: Gitea 1.27.3-rootless 部署实况 (repo.windy.me SSH:2222/Web), 16 仓迁移核对, 备份/回滚; soft-serve 停用保留作回滚
- compose/gitea: 参考镜像 (rootless compose + 备份 sidecar + 一次性迁移脚本留档)
- AGENTS/inventory/compose README: 服务表与索引同步

compose/gitea/compose.yml

@@ -0,0 +1,59 @@
+# Gitea on us2 — reference compose (Plane VPS-94, 迁移完成 2026-09-18)
+# 参考镜像, 服务器 /opt/gitea 文件为准 (同 soft-serve 约定, 未接入 compose-deploy)
+# rootless 镜像: uid 1000 原生非 root; 数据 /var/lib/gitea (宿主 ./data), 配置 /etc/gitea (宿主 ./config)
+# SSH: 容器内监听 2322 (非特权, SSH_LISTEN_PORT), 对外 repo.windy.me:2222 经 Traefik TCP entrypoint `ssh`
+services:
+  gitea:
+    image: gitea/gitea@sha256:1c17ecaead42eb3b5391553d8708103a4beb0e86edf5b9ebc1eb269c318845f2 # 1.27.3-rootless
+    container_name: gitea
+    restart: unless-stopped
+    user: "1000:1000"
+    environment:
+      TZ: Asia/Shanghai
+    volumes:
+      - ./data:/var/lib/gitea
+      - ./config:/etc/gitea
+      - ./secrets:/secrets:ro # 复用的 soft-serve host key (SSH_SERVER_HOST_KEYS)
+    networks:
+      - traefik
+    labels:
+      - traefik.enable=true
+      # Web UI: repo.windy.me (2026-09-18 操作者决定复用现有域名, 免 DNS 变更)
+      - traefik.http.routers.gitea-web.rule=Host(`repo.windy.me`)
+      - traefik.http.routers.gitea-web.entrypoints=websecure
+      - traefik.http.routers.gitea-web.tls.certresolver=letsencrypt
+      - traefik.http.services.gitea-web.loadbalancer.server.port=3000
+      # SSH: 接管 :2222 (entrypoint 已存在, router 动态生效, 无需重启 Traefik)
+      - traefik.tcp.routers.gitea-ssh.entrypoints=ssh
+      - traefik.tcp.routers.gitea-ssh.rule=HostSNI(`*`)
+      - traefik.tcp.routers.gitea-ssh.tls=false
+      - traefik.tcp.services.gitea-ssh.loadbalancer.server.port=2322
+
+  gitea-backup:
+    build:
+      context: .
+      dockerfile: Dockerfile.backup
+    container_name: gitea-backup
+    restart: unless-stopped
+    volumes:
+      - ./data:/data:ro
+      - ./config:/config:ro
+      - ./backups:/backup
+      - ./scripts:/scripts
+    environment:
+      TZ: Asia/Shanghai
+      BACKUP_UID: 1000
+      BACKUP_GID: 1000
+    entrypoint: >
+      /bin/sh -ec "
+        umask 077 &&
+        touch /backup/backup.log &&
+        crontab /scripts/crontab.txt &&
+        echo '[INFO] gitea backup cron installed' &&
+        crond -f -l 8
+      "
+
+networks:
+  traefik:
+    external: true
+    name: vw-net