fix: start nginx first, restore in background

snapshot_download of 7000+ files takes too long before port 7860
opens, causing HF startup timeout (RUNTIME_ERROR).

Fix: start all services + nginx immediately, then run restore
(download + rsync) in a background thread.

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

entrypoint.py

@@ -498,8 +498,6 @@ def main():
     resolve_config()
     system_info()
     ensure_dataset_repo()
-    restore_state()
-    restore_packages()
     ensure_passwords()
 
     # Write env for other processes
@@ -508,29 +506,39 @@ def main():
         f.write(f'export HF_DATASET_REPO="{HF_DATASET_REPO}"\n')
         f.write(f'export PERSIST_PATH="{PERSIST_PATH}"\n')
 
-    # Start services
+    # Start services + nginx FIRST (open port 7860 fast to avoid HF timeout)
     start_sshd()
     start_ws_bridge()
     start_ttyd()
     start_log_streamer()
 
-    # Background threads
-    threading.Thread(target=sync_loop, daemon=True).start()
-    threading.Thread(target=heartbeat_loop, daemon=True).start()
+    log("starting nginx on 0.0.0.0:7860 ...")
+    nginx_proc = subprocess.Popen(
+        ["nginx", "-c", "/etc/nginx/nginx.conf", "-g", "daemon off;"]
+    )
+    log(f"[  OK  ] nginx PID={nginx_proc.pid}")
 
     log("========================================")
-    log("system ready")
+    log("system ready (restore runs in background)")
     log(f"  Terminal: https://<space>.hf.space/")
     log(f"  Logs:    https://<space>.hf.space/runlog")
-    log(f"  SSE:     https://<space>.hf.space/runlog/stream")
     log("========================================")
 
-    # Start nginx as subprocess (NOT exec — we need threads to stay alive)
-    log("starting nginx on 0.0.0.0:7860 ...")
-    nginx_proc = subprocess.Popen(
-        ["nginx", "-c", "/etc/nginx/nginx.conf", "-g", "daemon off;"]
-    )
-    log(f"[  OK  ] nginx PID={nginx_proc.pid}")
+    # Restore in background (download + rsync can take minutes for large datasets)
+    def background_restore():
+        try:
+            restore_state()
+            restore_packages()
+            ensure_passwords()  # re-ensure after restore
+            log("── background restore complete ──")
+        except Exception as e:
+            log(f"── background restore error: {e} ──")
+
+    threading.Thread(target=background_restore, daemon=True).start()
+
+    # Background threads
+    threading.Thread(target=sync_loop, daemon=True).start()
+    threading.Thread(target=heartbeat_loop, daemon=True).start()
 
     # Final save on SIGTERM
     def on_sigterm(sig, frame):