Survive Binance eapi 418/429 with cooldown, soft start, and no ticker raise.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/strategy/session.py

@@ -112,7 +112,11 @@ class StrategySession:
             return
         self._started = True
         await self.ex.start()
-        await asyncio.to_thread(self.align_instruments)
+        try:
+            await asyncio.to_thread(self.align_instruments)
+        except Exception as e:
+            # eapi 418/429 时允许先起会话，后续 refresh 再对齐
+            logger.warning("initial ATM align failed (will retry): %s", e)
         await self.ex.resubscribe(
             [
                 self.settings.perp_inst_id,
@@ -205,6 +209,13 @@ class StrategySession:
             put_bids, put_asks, _ = self.ex.fetch_book(pair.put_inst_id, depth=5)
             call_ask = call_asks[0].px if call_asks else None
             put_ask = put_asks[0].px if put_asks else None
+            # REST 被限流时回退 WS/缓存盘口
+            if call_ask is None:
+                cq = self.ex.quote(pair.call_inst_id)
+                call_ask = cq.ask if cq else None
+            if put_ask is None:
+                pq = self.ex.quote(pair.put_inst_id)
+                put_ask = pq.ask if pq else None
             sig = decide(
                 call_ask,
                 put_ask,
@@ -335,7 +346,7 @@ class StrategySession:
 
     async def _refresh_loop(self) -> None:
         while True:
-            await asyncio.sleep(30)
+            await asyncio.sleep(30 if self._pair is not None else 10)
             try:
                 idx = await asyncio.to_thread(
                     self.ex.fetch_index, self.settings.index_inst_id
@@ -346,7 +357,10 @@ class StrategySession:
                 )
                 if mark:
                     self.ex.set_mark_px(self.settings.perp_inst_id, mark)
-                await self.ensure_atm_async(force=False)
+                if self._pair is None:
+                    await self.ensure_atm_async(force=True)
+                else:
+                    await self.ensure_atm_async(force=False)
             except asyncio.CancelledError:
                 raise
             except Exception as e: