feat: 重构 pkg/ast/provider 模块，优化代码组织逻辑和功能实现

## 主要改进

### 架构重构
- 将单体 provider.go 拆分为多个专门的模块文件
- 实现了清晰的职责分离和模块化设计
- 遵循 SOLID 原则，提高代码可维护性

### 新增功能
- **验证规则系统**: 实现了完整的 provider 验证框架
- **报告生成器**: 支持多种格式的验证报告 (JSON/HTML/Markdown/Text)
- **解析器优化**: 重新设计了解析流程，提高性能和可扩展性
- **错误处理**: 增强了错误处理和诊断能力

### 修复关键 Bug
- 修复 @provider(job) 注解缺失 __job 注入参数的问题
- 统一了 job 和 cronjob 模式的处理逻辑
- 确保了 provider 生成的正确性和一致性

### 代码质量提升
- 添加了完整的测试套件
- 引入了 golangci-lint 代码质量检查
- 优化了代码格式和结构
- 增加了详细的文档和规范

### 文件结构优化
```
pkg/ast/provider/
├── types.go              # 类型定义
├── parser.go             # 解析器实现
├── validator.go          # 验证规则
├── report_generator.go   # 报告生成
├── renderer.go           # 渲染器
├── comment_parser.go     # 注解解析
├── modes.go             # 模式定义
├── errors.go            # 错误处理
└── validator_test.go    # 测试文件
```

### 兼容性
- 保持向后兼容性
- 支持现有的所有 provider 模式
- 优化了 API 设计和用户体验

This completes the implementation of T025-T029 tasks following TDD principles,
including validation rules implementation and critical bug fixes.

pkg/ast/route/builder.go

@@ -16,40 +16,40 @@ type RenderBuildOpts struct {
 }
 
 func buildRenderData(opts RenderBuildOpts) (RenderData, error) {
-    rd := RenderData{
-        PackageName:    opts.PackageName,
-        ProjectPackage: opts.ProjectPackage,
-        Imports:        []string{},
-        Controllers:    []string{},
-        Routes:         make(map[string][]Router),
-        RouteGroups:    []string{},
-    }
+	rd := RenderData{
+		PackageName:    opts.PackageName,
+		ProjectPackage: opts.ProjectPackage,
+		Imports:        []string{},
+		Controllers:    []string{},
+		Routes:         make(map[string][]Router),
+		RouteGroups:    []string{},
+	}
 
-    imports := []string{}
-    controllers := []string{}
-    // Track if any param uses model lookup, which requires the field package.
-    needsFieldImport := false
+	imports := []string{}
+	controllers := []string{}
+	// Track if any param uses model lookup, which requires the field package.
+	needsFieldImport := false
 
 	for _, route := range opts.Routes {
 		imports = append(imports, route.Imports...)
 		controllers = append(controllers, fmt.Sprintf("%s *%s", strcase.ToLowerCamel(route.Name), route.Name))
 
-        for _, action := range route.Actions {
-            funcName := fmt.Sprintf("Func%d", len(action.Params))
-            if action.HasData {
-                funcName = "Data" + funcName
-            }
+		for _, action := range route.Actions {
+			funcName := fmt.Sprintf("Func%d", len(action.Params))
+			if action.HasData {
+				funcName = "Data" + funcName
+			}
 
-            params := lo.FilterMap(action.Params, func(item ParamDefinition, _ int) (string, bool) {
-                tok := buildParamToken(item)
-                if tok == "" {
-                    return "", false
-                }
-                if item.Model != "" {
-                    needsFieldImport = true
-                }
-                return tok, true
-            })
+			params := lo.FilterMap(action.Params, func(item ParamDefinition, _ int) (string, bool) {
+				tok := buildParamToken(item)
+				if tok == "" {
+					return "", false
+				}
+				if item.Model != "" {
+					needsFieldImport = true
+				}
+				return tok, true
+			})
 
 			rd.Routes[route.Name] = append(rd.Routes[route.Name], Router{
 				Method:     strcase.ToCamel(action.Method),
@@ -60,18 +60,18 @@ func buildRenderData(opts RenderBuildOpts) (RenderData, error) {
 				Params:     params,
 			})
 		}
-    }
+	}
 
-    // Add field import if any model lookups are used
-    if needsFieldImport {
-        imports = append(imports, `field "go.ipao.vip/gen/field"`)
-    }
+	// Add field import if any model lookups are used
+	if needsFieldImport {
+		imports = append(imports, `field "go.ipao.vip/gen/field"`)
+	}
 
-    // de-dup and sort imports/controllers for stable output
-    rd.Imports = lo.Uniq(imports)
-    sort.Strings(rd.Imports)
-    rd.Controllers = lo.Uniq(controllers)
-    sort.Strings(rd.Controllers)
+	// de-dup and sort imports/controllers for stable output
+	rd.Imports = lo.Uniq(imports)
+	sort.Strings(rd.Imports)
+	rd.Controllers = lo.Uniq(controllers)
+	sort.Strings(rd.Controllers)
 
 	// stable order for route groups and entries
 	for k := range rd.Routes {