fix(orion): narrow Buck target discovery for subproject all-added imports

Scope discovery to changed subtrees and rk8s subproject roots so all-added
CLs build rust_library/rust_binary targets instead of :vendor filegroups
or entire third-party graphs. Add graph-based rdeps when uquery fails,
platform --config injection, toolchain helper filtering, and optional
ORION_BUCK_REMOTE_CACHE. Move troubleshooting docs to orion/docs and
extend orion-scheduler VM/image deploy support.

Author: benjamin-747

Cargo.lock

@@ -7,8 +7,8 @@ import { LoadingSpinner } from '@gitmono/ui/Spinner'
 
 import { usePostRetryBuild } from '@/hooks/SSE/usePostRetryBuild'
 
-import { BuildDTO, getLatestBuildId, isTaskQueued, Status, TaskInfoDTO } from './store'
 import { TERMINAL_BUILD_STATUSES } from '../hooks/logUtils'
+import { BuildDTO, getLatestBuildId, isTaskQueued, Status, TaskInfoDTO } from './store'
 
 /**
  * Format ISO date string to readable format

moon/apps/web/components/ClView/components/Checks/cpns/Task.tsx

@@ -1,6 +1,17 @@
 import { TaskInfoDTO } from './store'
 
-/** Stable signature so effects only re-run when build ids or statuses change. */
+/**
+ * Stable signature so effects only re-run when build ids/statuses or target states
+ * change. Target states must be included: a build can stay `Building` while
+ * targets move from `Uninitialized` (queued) to `Building` (worker picked up).
+ */
 export function getTasksSignature(tasks: TaskInfoDTO[]): string {
-  return tasks.map((t) => `${t.task_id}:${t.build_list?.map((b) => `${b.id}:${b.status}`).join(',') ?? ''}`).join('|')
+  return tasks
+    .map((t) => {
+      const builds = t.build_list?.map((b) => `${b.id}:${b.status}`).join(',') ?? ''
+      const targets = t.targets?.map((tg) => tg.state).join(',') ?? ''
+
+      return `${t.task_id}:${builds}:${targets}`
+    })
+    .join('|')
 }

moon/apps/web/components/ClView/components/Checks/cpns/tasksSignature.ts

@@ -130,6 +130,8 @@ sudo modprobe nbd max_part=8
 sudo bash scripts/build-custom-image.sh
 ```
 
+> 镜像发布到**调用者**的 qlean 目录（`sudo` 从 `orion` 运行时即 `/home/orion/.local/share/qlean/images/`，不是 `/root/...`）。`orion-scheduler` 与 `cargo run` 也读该路径。可用 `OUTPUT_DIR=...` 覆盖。
+
 > 基础镜像下载源默认指向 USTC 镜像（`https://mirrors.ustc.edu.cn/debian-cdimage/cloud/trixie/latest`）。如需更换为官方源或其他镜像，通过 `BASE_MIRROR_URL` 覆盖（注意 `sudo` 需加 `-E` 传递环境变量）：
 >
 > ```bash