fix: bound the waits that could freeze the learn loop (app.py)

app.py

@@ -899,6 +899,30 @@ def voyager_status():
     return data
 
 
+@api.get("/voyager/log")
+def voyager_log(lines: int = 200, find: str | None = None):
+    """Expose the runner log.
+
+    /voyager/status deliberately drops log_tail: that payload is polled by the
+    dashboard and the log is large. Dropping it there left the loop's own
+    traceback unobservable from outside the Space -- the Hugging Face log
+    stream can lag hours behind, so a wedged runner looked identical to a
+    healthy one. This endpoint reads the same file the status builds from, on
+    demand, without changing the status contract.
+    """
+    lines = max(1, min(int(lines or 200), 5000))
+    tail = VOYAGER.tail(lines)
+    if find:
+        kept = [row for row in tail.splitlines() if find in row]
+        tail = "\n".join(kept)
+    return {
+        "lines": lines,
+        "find": find,
+        "bytes": len(tail),
+        "log": tail,
+    }
+
+
 @api.get("/gemini-bot/status")
 def gemini_bot_status():
     return GEMINI_BOT.status()