improve signed reads, crypto hardening, and scraper transport

app/main.py

@@ -139,17 +139,12 @@ async def lifespan(app: FastAPI):
 
     # 3. Start Truth Social poller via APScheduler
     _scheduler = AsyncIOScheduler()
-    # Signal monitor — polls every 5 minutes
-    from app.services.funding_signal import poll_funding_signal
-    _scheduler.add_job(
-        poll_funding_signal,
-        "interval",
-        minutes=5,
-        id="funding_signal_poll",
-        max_instances=1,
-        coalesce=True,
-    )
-    logger.info("Breakout signal monitor scheduled every 5 minutes.")
+    # Breakout signal monitor (poll_funding_signal, ETH/LINK 5m) UNSCHEDULED
+    # 2026-06-12: the feature has been disabled for months (_enabled=False,
+    # operator-only toggle) and the frontend panel that displayed it was
+    # removed — the 5-min Binance kline poll was pure waste. The /signal/*
+    # API routes still work; to revive, re-add the add_job() here AND remount
+    # SignalMonitor in the frontend's MacroVibesPageClient.
 
     _scheduler.add_job(
         poll_truth_social,
@@ -347,6 +342,8 @@ async def lifespan(app: FastAPI):
             await _telegram_task
         except asyncio.CancelledError:
             pass
+    from app.services.http_client import aclose as http_client_aclose
+    await http_client_aclose()
     await engine.dispose()
     logger.info("Shutdown complete.")