refactor: shorten model and table prefixes

backend/internal/models/ai_rate_bucket.go

@@ -2,18 +2,18 @@ package models
 
 import "time"
 
-// SenlinAgentAIRateBucket 保存用户在固定窗口内已占用的 AI 请求配额。
+// SaAIRateBucket 保存用户在固定窗口内已占用的 AI 请求配额。
 // 复合唯一键让单条 UPSERT 在数据库层完成跨进程并发仲裁。
-type SenlinAgentAIRateBucket struct {
+type SaAIRateBucket struct {
 	ID          uint      `gorm:"primaryKey"`
-	UserID      uint      `gorm:"not null;uniqueIndex:uidx_senlin_agent_ai_rate_bucket,priority:1"`
-	Action      string    `gorm:"size:100;not null;uniqueIndex:uidx_senlin_agent_ai_rate_bucket,priority:2"`
-	WindowStart time.Time `gorm:"not null;uniqueIndex:uidx_senlin_agent_ai_rate_bucket,priority:3"`
+	UserID      uint      `gorm:"not null;uniqueIndex:uidx_sa_ai_rate_bucket,priority:1"`
+	Action      string    `gorm:"size:100;not null;uniqueIndex:uidx_sa_ai_rate_bucket,priority:2"`
+	WindowStart time.Time `gorm:"not null;uniqueIndex:uidx_sa_ai_rate_bucket,priority:3"`
 	Count       int       `gorm:"not null"`
 	CreatedAt   time.Time
 	UpdatedAt   time.Time
 }
 
-func (SenlinAgentAIRateBucket) TableName() string {
-	return "senlin_agent_ai_rate_buckets"
+func (SaAIRateBucket) TableName() string {
+	return "sa_ai_rate_buckets"
 }