fix: add job cancel and tune artifact download

scripts/src/help.ts

@@ -84,6 +84,7 @@ export function rootHelp(): unknown {
       { command: "codex (queues [--full|--all] | queue create <queueId> | queue merge <sourceQueueId> --into <targetQueueId> | move <taskId> --queue <queueId>)", description: "List low-noise queue summaries by default, including effective activity counts that distinguish scheduler-local queues, DB running tasks, and heartbeat-fresh runners; full queue rows require --full/--all." },
       { command: "job list [--limit N] [--include-command]", description: "List async jobs from .state/jobs with a bounded default page and progress summaries." },
       { command: "job status <jobId|latest> [--tail-bytes N]", description: "Show job state with a structured progress summary and bounded stdout/stderr tails." },
+      { command: "job cancel <jobId>", description: "Cancel a queued/running async job through the .state/jobs control entry and keep a terminal canceled record." },
       { command: "debug health", description: "Probe internal core, nodes, system/Docker status, frontend, provider ingress, and public boundary." },
       { command: "debug dispatch [providerId] [docker.ps|provider.upgrade|host.ssh|microservice.http|echo] [--wait-ms N]", description: "Submit a real internal-core dispatch request for CLI debugging." },
       { command: "debug task <taskId|latest>", description: "Read a dispatched task record from internal core for CLI debugging." },
@@ -480,13 +481,14 @@ function codexHelp(): unknown {
 
 function jobHelp(): unknown {
   return {
-    command: "job list|status",
+    command: "job list|status|cancel",
     output: "json",
     usage: [
       "bun scripts/cli.ts job list [--limit N] [--include-command]",
       "bun scripts/cli.ts job status <jobId|latest> [--tail-bytes N]",
+      "bun scripts/cli.ts job cancel <jobId>",
     ],
-    description: "Inspect fire-and-forget job state from .state/jobs with structured progress summaries and bounded log tails.",
+    description: "Inspect or cancel fire-and-forget job state from .state/jobs with structured progress summaries and bounded log tails.",
   };
 }