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/store/template_store.go

@@ -0,0 +1,113 @@
+package store
+
+import (
+	"context"
+	"errors"
+
+	"gorm.io/gorm"
+
+	"gcy_hpc_server/internal/model"
+)
+
+// TemplateStore provides CRUD operations for job templates via GORM.
+type TemplateStore struct {
+	db *gorm.DB
+}
+
+// NewTemplateStore creates a new TemplateStore.
+func NewTemplateStore(db *gorm.DB) *TemplateStore {
+	return &TemplateStore{db: db}
+}
+
+// List returns a paginated list of job templates and the total count.
+func (s *TemplateStore) List(ctx context.Context, page, pageSize int) ([]model.JobTemplate, int, error) {
+	var templates []model.JobTemplate
+	var total int64
+
+	if err := s.db.WithContext(ctx).Model(&model.JobTemplate{}).Count(&total).Error; err != nil {
+		return nil, 0, err
+	}
+
+	offset := (page - 1) * pageSize
+	if err := s.db.WithContext(ctx).Order("id DESC").Limit(pageSize).Offset(offset).Find(&templates).Error; err != nil {
+		return nil, 0, err
+	}
+
+	return templates, int(total), nil
+}
+
+// GetByID returns a single job template by ID. Returns nil, nil when not found.
+func (s *TemplateStore) GetByID(ctx context.Context, id int64) (*model.JobTemplate, error) {
+	var t model.JobTemplate
+	err := s.db.WithContext(ctx).First(&t, id).Error
+	if errors.Is(err, gorm.ErrRecordNotFound) {
+		return nil, nil
+	}
+	if err != nil {
+		return nil, err
+	}
+	return &t, nil
+}
+
+// Create inserts a new job template and returns the generated ID.
+func (s *TemplateStore) Create(ctx context.Context, req *model.CreateTemplateRequest) (int64, error) {
+	t := &model.JobTemplate{
+		Name:        req.Name,
+		Description: req.Description,
+		Script:      req.Script,
+		Partition:   req.Partition,
+		QOS:         req.QOS,
+		CPUs:        req.CPUs,
+		Memory:      req.Memory,
+		TimeLimit:   req.TimeLimit,
+	}
+	if err := s.db.WithContext(ctx).Create(t).Error; err != nil {
+		return 0, err
+	}
+	return t.ID, nil
+}
+
+// Update modifies an existing job template. Only non-empty/non-zero fields are updated.
+func (s *TemplateStore) Update(ctx context.Context, id int64, req *model.UpdateTemplateRequest) error {
+	updates := map[string]interface{}{}
+	if req.Name != "" {
+		updates["name"] = req.Name
+	}
+	if req.Description != "" {
+		updates["description"] = req.Description
+	}
+	if req.Script != "" {
+		updates["script"] = req.Script
+	}
+	if req.Partition != "" {
+		updates["partition"] = req.Partition
+	}
+	if req.QOS != "" {
+		updates["qos"] = req.QOS
+	}
+	if req.CPUs > 0 {
+		updates["cpus"] = req.CPUs
+	}
+	if req.Memory != "" {
+		updates["memory"] = req.Memory
+	}
+	if req.TimeLimit != "" {
+		updates["time_limit"] = req.TimeLimit
+	}
+
+	if len(updates) == 0 {
+		return nil // nothing to update
+	}
+
+	result := s.db.WithContext(ctx).Model(&model.JobTemplate{}).Where("id = ?", id).Updates(updates)
+	return result.Error
+}
+
+// Delete removes a job template by ID. Idempotent — returns nil even if the row doesn't exist.
+func (s *TemplateStore) Delete(ctx context.Context, id int64) error {
+	result := s.db.WithContext(ctx).Delete(&model.JobTemplate{}, id)
+	if result.Error != nil {
+		return result.Error
+	}
+	return nil
+}