feat(voice): 每用户 JARVIS——自定义名字/人设 + 自带豆包配置回落 + 语音不串主记忆

把 JARVIS 做成每用户独立:名字(你叫JARVIS别人叫星期五)、人设(与主偏好记忆分开)、
可自带豆包配置(齐全则用用户的,否则回落系统)。

- store/user_jarvis.go: sundynix_user_jarvis(user_id唯一;name/persona/火山creds,APIKey密文)
  + Get/Save(upsert) + AutoMigrate 注册
- voice_config.go resolveJarvis(uid): 火山配置用户优先系统兜底 + 取名字/人设
- voice_task.go: voiceSystemPrompt(name,persona)——简短是硬基线,名字/语气由用户定;
  buildVoiceGraph 带 name+persona;voice.go 会话升级时按用户解析
- dispatcher compose_compiler: 语音任务(useVoice)不拉主偏好记忆,改用用户 persona(保留短期历史)
- jarvis.go + 路由: GET/PUT /api/v1/me/jarvis(用户级,api_key 脱敏/留空沿用)

真机验证:设 name=星期五+干净人设→语音答"我是星期五…"(自称新名、无糙话、4.4s),
has_own_voice=false 用系统豆包。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

sundynix-gateway/internal/store/migrate.go

@@ -68,7 +68,7 @@ func migratedModels() []any {
 		&User{}, &Task{}, &Eval{}, &LLMModel{}, &KB{}, &Doc{}, &Agent{}, &DocLink{}, &Pricing{}, &Prompt{},
 		&AuditLog{}, &GuardrailEvent{}, &Tenant{}, &TenantMember{}, &TenantInvite{}, &Space{}, &SpaceMember{},
 		&UsageEvent{}, &CreditLedger{}, &UsageRollup{}, &Setting{}, &CreditPack{}, &PaymentOrder{},
-		&RedeemCode{}, &SubscriptionPlan{}, &Subscription{}, &SchemaMigration{},
+		&RedeemCode{}, &SubscriptionPlan{}, &Subscription{}, &UserJarvis{}, &SchemaMigration{},
 	}
 }