feat: increase DEEP_TIMEOUT to 600 seconds

Updates the default `DEEP_TIMEOUT` value from 300 to 600 seconds in `ai_review/config.py` to allow more time for deep review processing.

ai_review/config.py

@@ -14,7 +14,7 @@ MAX_DIFF_LINES = int(os.environ.get("AI_REVIEW_MAX_DIFF_LINES", "2000"))
 STANDARD_MAX_TOKENS = int(os.environ.get("AI_REVIEW_STANDARD_MAX_TOKENS", "4096"))
 DEEP_MAX_TOKENS = int(os.environ.get("AI_REVIEW_DEEP_MAX_TOKENS", "8192"))
 STANDARD_TIMEOUT = int(os.environ.get("AI_REVIEW_STANDARD_TIMEOUT", "180"))
-DEEP_TIMEOUT = int(os.environ.get("AI_REVIEW_DEEP_TIMEOUT", "300"))
+DEEP_TIMEOUT = int(os.environ.get("AI_REVIEW_DEEP_TIMEOUT", "600"))
 
 # ─── 平台预设（android / ios / frontend，留空或其他值则使用通用配置） ───
 PLATFORM = os.environ.get("AI_REVIEW_PLATFORM", "").strip().lower()