add initial stuff

internal/db/models.go

@@ -0,0 +1,15 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.27.0
+
+package db
+
+type Session struct {
+	ID           string  `json:"id"`
+	Title        string  `json:"title"`
+	MessageCount int64   `json:"message_count"`
+	Tokens       int64   `json:"tokens"`
+	Cost         float64 `json:"cost"`
+	UpdatedAt    int64   `json:"updated_at"`
+	CreatedAt    int64   `json:"created_at"`
+}