feat: add logging and caching enhancements across core services

Integrate `Logger` for consistent logging in services like `reports`, `categories`, `users`, `contents`, and more. Introduce caching capabilities with `CacheInterceptor` and manual cache clearing logic for categories, users, and contents. Add request throttling to critical auth endpoints for enhanced rate limiting.

backend/src/contents/contents.service.ts

@@ -1,4 +1,7 @@
-import { BadRequestException, Injectable } from "@nestjs/common";
+import { BadRequestException, Injectable, Logger } from "@nestjs/common";
+import { CACHE_MANAGER } from "@nestjs/cache-manager";
+import { Cache } from "cache-manager";
+import { Inject } from "@nestjs/common";
 import { ConfigService } from "@nestjs/config";
 import {
 	and,
@@ -27,13 +30,25 @@ import { CreateContentDto } from "./dto/create-content.dto";
 
 @Injectable()
 export class ContentsService {
+	private readonly logger = new Logger(ContentsService.name);
+
 	constructor(
 		private readonly databaseService: DatabaseService,
 		private readonly s3Service: S3Service,
 		private readonly mediaService: MediaService,
 		private readonly configService: ConfigService,
+		@Inject(CACHE_MANAGER) private cacheManager: Cache,
 	) {}
 
+	private async clearContentsCache() {
+		this.logger.log("Clearing contents cache");
+		const keys = await this.cacheManager.store.keys();
+		const contentsKeys = keys.filter((key) => key.startsWith("contents/"));
+		for (const key of contentsKeys) {
+			await this.cacheManager.del(key);
+		}
+	}
+
 	async getUploadUrl(userId: string, fileName: string) {
 		const key = `uploads/${userId}/${Date.now()}-${fileName}`;
 		const url = await this.s3Service.getUploadUrl(key);
@@ -50,6 +65,7 @@ export class ContentsService {
 			tags?: string[];
 		},
 	) {
+		this.logger.log(`Uploading and processing file for user ${userId}`);
 		// 0. Validation du format et de la taille
 		const allowedMimeTypes = [
 			"image/png",
@@ -225,6 +241,7 @@ export class ContentsService {
 	}
 
 	async create(userId: string, data: CreateContentDto) {
+		this.logger.log(`Creating content for user ${userId}: ${data.title}`);
 		const { tags: tagNames, ...contentData } = data;
 
 		const slug = await this.ensureUniqueSlug(contentData.title);
@@ -264,6 +281,7 @@ export class ContentsService {
 				}
 			}
 
+			await this.clearContentsCache();
 			return newContent;
 		});
 	}
@@ -285,11 +303,17 @@ export class ContentsService {
 	}
 
 	async remove(id: string, userId: string) {
-		return await this.databaseService.db
+		this.logger.log(`Removing content ${id} for user ${userId}`);
+		const result = await this.databaseService.db
 			.update(contents)
 			.set({ deletedAt: new Date() })
 			.where(and(eq(contents.id, id), eq(contents.userId, userId)))
 			.returning();
+
+		if (result.length > 0) {
+			await this.clearContentsCache();
+		}
+		return result;
 	}
 
 	async findOne(idOrSlug: string) {