feat: pricing stat.

models/pricing.go

@@ -0,0 +1,29 @@
+package models
+
+import (
+	"gorm.io/gorm"
+)
+
+type AIPricingConfig struct {
+	gorm.Model
+	Name                  string  `gorm:"size:64;uniqueIndex" json:"name"`
+	Provider              string  `gorm:"size:64" json:"provider"`
+	InputPricePerMillion  float64 `json:"inputPricePerMillion"`
+	OutputPricePerMillion float64 `json:"outputPricePerMillion"`
+}
+
+func EnsureDefaultAIPricing(db *gorm.DB) error {
+	var count int64
+	if err := db.Model(&AIPricingConfig{}).Count(&count).Error; err != nil {
+		return err
+	}
+	if count > 0 {
+		return nil
+	}
+	return db.Create(&AIPricingConfig{
+		Name:                  "deepseek-v4-flash",
+		Provider:              "tencentmaas",
+		InputPricePerMillion:  1,
+		OutputPricePerMillion: 2,
+	}).Error
+}