feat(endcycle-sniper): add unit test suite and fix datetime deprecation

polymarket-endcycle-sniper-bot/exports/bot.py

@@ -2,7 +2,7 @@
 
 import asyncio
 from dataclasses import dataclass, field
-from datetime import datetime
+from datetime import datetime, timezone
 from decimal import Decimal
 from typing import Optional
 
@@ -21,7 +21,7 @@
 class BotStats:
     """Runtime statistics for the bot."""
 
-    started_at: datetime = field(default_factory=datetime.utcnow)
+    started_at: datetime = field(default_factory=lambda: datetime.now(timezone.utc))
     scan_cycles: int = 0
     markets_scanned: int = 0
     opportunities_found: int = 0
@@ -178,7 +178,7 @@ async def shutdown(self) -> None:
 
     def _log_stats(self) -> None:
         """Log current statistics."""
-        runtime = datetime.utcnow() - self.stats.started_at
+        runtime = datetime.now(timezone.utc) - self.stats.started_at
         hours = runtime.total_seconds() / 3600
 
         log.info(
@@ -194,7 +194,7 @@ def _log_stats(self) -> None:
 
     def get_stats(self) -> dict:
         """Get current statistics."""
-        runtime = datetime.utcnow() - self.stats.started_at
+        runtime = datetime.now(timezone.utc) - self.stats.started_at
 
         return {
             "runtime_seconds": runtime.total_seconds(),
@@ -303,7 +303,7 @@ async def _on_markets_loaded(self, markets: list) -> None:
 
     async def _save_near_miss_alert(self, alert, min_required: Decimal) -> None:
         """Save an illiquid arbitrage alert to the database."""
-        from datetime import datetime, timezone
+        from datetime import datetime, timezone, timezone
         from rarb.data.repositories import NearMissAlertRepository
 
         try:
@@ -324,7 +324,7 @@ async def _save_near_miss_alert(self, alert, min_required: Decimal) -> None:
 
     async def _save_insufficient_balance_alert(self, alert, required: Decimal, available: Decimal) -> None:
         """Save an alert for when balance is insufficient."""
-        from datetime import datetime, timezone
+        from datetime import datetime, timezone, timezone
         from rarb.data.repositories import NearMissAlertRepository
 
         try:
@@ -575,7 +575,7 @@ async def _auto_redemption_loop(self) -> None:
 
     async def _stats_history_loop(self) -> None:
         """Background task that records hourly stats snapshots for charting."""
-        from datetime import datetime, timezone
+        from datetime import datetime, timezone, timezone
         from rarb.data.repositories import StatsHistoryRepository
 
         # Wait a bit before first record
@@ -624,7 +624,7 @@ async def _stats_history_loop(self) -> None:
 
     async def _minute_stats_loop(self) -> None:
         """Background task that records minute-level price update stats."""
-        from datetime import datetime, timezone
+        from datetime import datetime, timezone, timezone
         from rarb.data.repositories import MinuteStatsRepository
 
         # Wait a bit before first record
@@ -828,7 +828,7 @@ async def shutdown(self) -> None:
 
     def _log_stats(self) -> None:
         """Log statistics."""
-        runtime = datetime.utcnow() - self.stats.started_at
+        runtime = datetime.now(timezone.utc) - self.stats.started_at
         hours = runtime.total_seconds() / 3600
 
         scanner_stats = self.scanner.get_stats()