fix: use --user flag for pip install (non-root container)

Container runs as node user, not root. pip install without --user
can't write to system site-packages. Also log pip result for debugging.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

scripts/sync_hf.py

@@ -783,10 +783,15 @@ def main():
                 """Launch conversation-loop with auto-restart on crash."""
                 nonlocal conv_loop_proc
                 time.sleep(60)  # let OpenClaw fully initialize
-                # Ensure requests is installed (may be missing from Docker image)
-                subprocess.run([sys.executable, "-m", "pip", "install", "-q",
-                                "--break-system-packages", "requests"],
-                               capture_output=True, timeout=60)
+                # Ensure requests is installed (runs as non-root user node)
+                pip_result = subprocess.run(
+                    [sys.executable, "-m", "pip", "install", "--user",
+                     "--break-system-packages", "requests"],
+                    capture_output=True, text=True, timeout=120)
+                if pip_result.returncode != 0:
+                    print(f"[SYNC] pip install requests failed: {pip_result.stderr[:200]}")
+                else:
+                    print("[SYNC] pip install requests OK")
                 script = os.path.join(os.path.dirname(__file__), "conversation-loop.py")
                 if not os.path.exists(script):
                     print(f"[SYNC] conversation-loop.py not found at {script}")