feat: add SQL queries for token usage and top questions analytics

Author: wxg0103

apps/application/sql/get_token_usage_ee.sql

@@ -0,0 +1,10 @@
+SELECT SUM(application_chat_record.message_tokens + application_chat_record.answer_tokens) as "token_usage",
+       MAX(COALESCE(chat_user.username, application_chat.asker ->>'username', '游客')) as "username"
+FROM application_chat_record application_chat_record
+         LEFT JOIN application_chat application_chat ON application_chat."id" = application_chat_record.chat_id
+         LEFT JOIN chat_user chat_user ON chat_user.id::varchar = application_chat.chat_user_id
+    ${default_sql}
+GROUP BY
+    application_chat.chat_user_id
+ORDER BY
+    "token_usage" DESC

apps/application/sql/top_questions_ee.sql

@@ -0,0 +1,11 @@
+SELECT COUNT(application_chat_record."id")                                             AS chat_record_count,
+       MAX(COALESCE(chat_user.username, application_chat.asker ->>'username', '游客')) as "username"
+FROM application_chat_record application_chat_record
+         LEFT JOIN application_chat application_chat ON application_chat."id" = application_chat_record.chat_id
+         LEFT JOIN chat_user chat_user ON chat_user.id::varchar = application_chat.chat_user_id ${default_sql}
+GROUP BY
+    application_chat.chat_user_id
+ORDER BY
+    chat_record_count DESC,
+    username ASC
+