update for mcp

backend/app/config/settings.py

@@ -94,9 +94,21 @@ class Settings(BaseSettings):
     perception_max_events_per_source: int = Field(
         default=100, description="Maximum events fetched per source per crawl run."
     )
-    perception_diff_similarity_threshold: float = Field(
-        default=0.85,
-        description="Cosine similarity below which a paragraph is flagged as changed.",
+    perception_diff_min_change_ratio: float = Field(
+        default=0.02,
+        description=(
+            "Fraction of characters that must differ before an otherwise "
+            "unremarkable paragraph edit is worth an LLM classification call. "
+            "Numeric and deontic changes bypass this gate entirely."
+        ),
+    )
+    perception_crawl_interval_seconds: int = Field(
+        default=21600,
+        description=(
+            "How often Celery Beat runs the scheduled crawl-all-sources task, "
+            "in seconds. Default 21600 = 6 hours. Only takes effect when a "
+            "Beat process is running (./dev.sh start beat)."
+        ),
     )
 
     # Keep configuration setup explicit so runtime behavior is easy to reason about.
@@ -117,7 +129,7 @@ class Settings(BaseSettings):
     # Keep configuration setup explicit so runtime behavior is easy to reason about.
     qwen_api_key: str = Field(default="", description="Qwen API密钥")
     qwen_base_url: str = Field(default="http://6.86.80.4:30080/v1", description="Qwen API地址")
-    qwen_model: str = Field(default="qwen3.5-flash", description="Qwen文本模型")
+    qwen_model: str = Field(default="qwen3.6-flash", description="Qwen文本模型")
     qwen_vl_model: str = Field(default="qwen3-vl-plus", description="Qwen视觉模型")
 
     # Keep configuration setup explicit so runtime behavior is easy to reason about.