refactor: unify LLM gateway policy

database.py

@@ -874,16 +874,26 @@ class ReviewDatabase:
         model: str,
         status: str,
         latency_ms: int = 0,
+        *,
+        role: str = "",
+        prompt_version: str = "",
+        error_code: str = "",
+        input_tokens: int = 0,
+        output_tokens: int = 0,
     ) -> None:
         now = datetime.now(timezone.utc).isoformat(timespec="seconds")
         with self.connect() as connection:
             connection.execute(
                 """
                 INSERT INTO llm_usage
-                    (user_id, feature, source, model, status, latency_ms, created_at)
-                VALUES (?, ?, ?, ?, ?, ?, ?)
+                    (user_id, feature, source, model, status, latency_ms, created_at,
+                     role, prompt_version, error_code, input_tokens, output_tokens)
+                VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
                 """,
-                (user_id, feature, source, model, status, int(latency_ms), now),
+                (
+                    user_id, feature, source, model, status, int(latency_ms), now,
+                    role, prompt_version, error_code, int(input_tokens), int(output_tokens),
+                ),
             )
 
     def count_llm_usage_since(self, user_id: int, source: str, since: str) -> int: