refactor: cleanup unused code and simplify internal packages

This commit performs a significant cleanup of the codebase by removing unused functions, methods, and entire files across various internal modules. This reduces technical debt and simplifies the project structure.

Key changes include:
- **cache**: Removed unused cache key generators and metrics snapshots.
- **dto**: Removed redundant converter functions and segment creation helpers.
- **middleware**: Deleted the unused `logger.go` middleware and simplified `ratelimit.go` and `casbin.go`.
- **model**: Removed unused ID helpers, database closing functions, and batch decryption logic.
- **pkg**: Cleaned up unused utility functions in `circuitbreaker`, `crypto`, `cursor`, `hook`, and `utils`.
- **service**: Deleted `account_cleanup_service.go` and removed unused helper functions in `log_cleanup_service.go` and `sensitive_service.go`.
- **repository**: Removed unused private loading methods in `comment_repo.go`.

internal/handler/admin_report_handler.go

@@ -1,7 +1,6 @@
 package handler
 
 import (
-	"strconv"
 	"with_you/internal/dto"
 	"with_you/internal/pkg/response"
 	"with_you/internal/service"
@@ -138,15 +137,3 @@ func (h *AdminReportHandler) BatchHandle(c *gin.Context) {
 	response.Success(c, result)
 }
 
-// parsePageParams 解析分页参数
-func parsePageParams(c *gin.Context) (int, int) {
-	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
-	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))
-	if page < 1 {
-		page = 1
-	}
-	if pageSize < 1 || pageSize > 100 {
-		pageSize = 20
-	}
-	return page, pageSize
-}