feat: 添加数据模型和存储层

- model: JobTemplate、SubmitJobRequest、JobHistoryQuery 等模型定义

- store: NewGormDB MySQL 连接池，使用 zap 日志替代 GORM 默认日志

- store: TemplateStore CRUD 操作，支持 GORM AutoMigrate

- NewGormDB 接受 gormLevel 参数，由上层传入配置值

- 完整 TDD 测试覆盖

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

internal/model/template.go

@@ -0,0 +1,45 @@
+package model
+
+import "time"
+
+// JobTemplate represents a saved job template.
+type JobTemplate struct {
+	ID          int64     `json:"id" gorm:"primaryKey;autoIncrement"`
+	Name        string    `json:"name" gorm:"uniqueIndex;size:255;not null"`
+	Description string    `json:"description,omitempty" gorm:"type:text"`
+	Script      string    `json:"script" gorm:"type:text;not null"`
+	Partition   string    `json:"partition,omitempty" gorm:"size:255"`
+	QOS         string    `json:"qos,omitempty" gorm:"column:qos;size:255"`
+	CPUs        int       `json:"cpus,omitempty" gorm:"column:cpus"`
+	Memory      string    `json:"memory,omitempty" gorm:"size:50"`
+	TimeLimit   string    `json:"time_limit,omitempty" gorm:"column:time_limit;size:50"`
+	CreatedAt   time.Time `json:"created_at"`
+	UpdatedAt   time.Time `json:"updated_at"`
+}
+
+// TableName specifies the database table name for GORM.
+func (JobTemplate) TableName() string { return "job_templates" }
+
+// CreateTemplateRequest is the API request for creating a template.
+type CreateTemplateRequest struct {
+	Name        string `json:"name" binding:"required"`
+	Description string `json:"description,omitempty"`
+	Script      string `json:"script" binding:"required"`
+	Partition   string `json:"partition,omitempty"`
+	QOS         string `json:"qos,omitempty"`
+	CPUs        int    `json:"cpus,omitempty"`
+	Memory      string `json:"memory,omitempty"`
+	TimeLimit   string `json:"time_limit,omitempty"`
+}
+
+// UpdateTemplateRequest is the API request for updating a template.
+type UpdateTemplateRequest struct {
+	Name        string `json:"name,omitempty"`
+	Description string `json:"description,omitempty"`
+	Script      string `json:"script,omitempty"`
+	Partition   string `json:"partition,omitempty"`
+	QOS         string `json:"qos,omitempty"`
+	CPUs        int    `json:"cpus,omitempty"`
+	Memory      string `json:"memory,omitempty"`
+	TimeLimit   string `json:"time_limit,omitempty"`
+}