runpod: fetch lastStatusChange, the field that says why a pod is EXITED

A dead pod produced three hundred seconds of 'still no port' and no reason at
all, because the one Pod field that carries the reason was never queried. It
now travels into the progress line and the failure message, so an EXITED pod
says what RunPod says about it instead of leaving the cause to be guessed.

The strict-mode removal in boot.sh was one such guess: the image boots cleanly
here with a minimal environment and with a GPU exposed, so it does not
reproduce the exit. This is how the real cause gets found.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0182DhR1eFNPQyGmDrpHbedY

codai/api/runpod_client.py

@@ -325,6 +325,7 @@ class RunpodClient:
           pod(input: $input) {
             id
             desiredStatus
+            lastStatusChange
             costPerHr
             runtime {
               uptimeInSeconds
@@ -339,6 +340,11 @@ class RunpodClient:
         return {
             "id": p.get("id") or pod_id,
             "status": p.get("desiredStatus"),
+            # The one field that says WHY a pod is EXITED. It reads like
+            # "Rented by User: ..." or "container exited with code 1" — and it
+            # was never fetched, so a dead pod produced three hundred seconds
+            # of "still no port" and no reason at all.
+            "last_change": p.get("lastStatusChange") or "",
             "uptime_s": rt.get("uptimeInSeconds") or 0,
             "cost_per_hr": p.get("costPerHr"),
             "ports": ports,
@@ -444,8 +450,8 @@ class RunpodClient:
                 raise RunpodError(
                     f"Pod {pod_id} container EXITED on boot (uptime "
                     f"{info.get('uptime_s')}s) — the image pulled but the process "
-                    f"died immediately. Not a pull problem: check the image's "
-                    f"entrypoint and the console log.")
+                    f"died immediately. RunPod says: "
+                    f"{info.get('last_change') or '(no reason given)'}")
             if info.get("ready"):
                 return pod_proxy_url(pod_id, port)
             # A multi-GB image pull is minutes of silence otherwise, which reads
@@ -453,7 +459,7 @@ class RunpodClient:
             if time.time() >= next_report:
                 next_report = time.time() + 60.0
                 why = ("image pull in progress" if info.get("status") != "EXITED"
-                       else "container has EXITED — waiting for a restart")
+                       else f"container has EXITED ({info.get('last_change') or 'no reason given'})")
                 print(f"[runpod] pod {pod_id}: still no port after "
                       f"{time.time() - started:.0f}s "
                       f"(status={info.get('status')} uptime={info.get('uptime_s')}s) "