feat(chat): sqlc queries for conversations/messages/attachments/templates/endpoints/models/usage

internal/chat/queries/usage.sql

@@ -0,0 +1,49 @@
+-- name: InsertUsage :exec
+INSERT INTO llm_usage (
+    conversation_id, message_id, user_id, endpoint_id, model_id,
+    prompt_tokens, completion_tokens, thinking_tokens, cost_usd
+) VALUES ($1,$2,$3,$4,$5,$6,$7,$8,$9);
+
+-- name: SummarizeUsageByUser :many
+SELECT user_id,
+       SUM(prompt_tokens)::int     AS prompt_tokens,
+       SUM(completion_tokens)::int AS completion_tokens,
+       SUM(thinking_tokens)::int   AS thinking_tokens,
+       SUM(cost_usd)::numeric      AS cost_usd
+FROM llm_usage
+WHERE created_at >= $1 AND created_at < $2
+GROUP BY user_id
+ORDER BY cost_usd DESC;
+
+-- name: SummarizeUsageByModel :many
+SELECT model_id,
+       SUM(prompt_tokens)::int     AS prompt_tokens,
+       SUM(completion_tokens)::int AS completion_tokens,
+       SUM(thinking_tokens)::int   AS thinking_tokens,
+       SUM(cost_usd)::numeric      AS cost_usd
+FROM llm_usage
+WHERE created_at >= $1 AND created_at < $2
+GROUP BY model_id
+ORDER BY cost_usd DESC;
+
+-- name: SummarizeUsageByDay :many
+SELECT date_trunc('day', created_at) AS day,
+       SUM(prompt_tokens)::int     AS prompt_tokens,
+       SUM(completion_tokens)::int AS completion_tokens,
+       SUM(thinking_tokens)::int   AS thinking_tokens,
+       SUM(cost_usd)::numeric      AS cost_usd
+FROM llm_usage
+WHERE created_at >= $1 AND created_at < $2
+GROUP BY day
+ORDER BY day;
+
+-- name: SummarizeUserDaily :many
+SELECT date_trunc('day', created_at) AS day,
+       SUM(prompt_tokens)::int     AS prompt_tokens,
+       SUM(completion_tokens)::int AS completion_tokens,
+       SUM(thinking_tokens)::int   AS thinking_tokens,
+       SUM(cost_usd)::numeric      AS cost_usd
+FROM llm_usage
+WHERE user_id = $1 AND created_at >= $2 AND created_at < $3
+GROUP BY day
+ORDER BY day;