feat: implement ApiKeysModule with services, controller, and CRUD operations

Added a dedicated ApiKeysModule to manage API keys. Includes functionality to create, list, revoke, and validate keys, leveraging cryptographic hashing and database support. Integrated with authentication guards for security.

backend/src/api-keys/api-keys.controller.ts

@@ -0,0 +1,42 @@
+import {
+	Body,
+	Controller,
+	Delete,
+	Get,
+	Param,
+	Post,
+	Req,
+	UseGuards,
+} from "@nestjs/common";
+import { AuthGuard } from "../auth/guards/auth.guard";
+import type { AuthenticatedRequest } from "../common/interfaces/request.interface";
+import { ApiKeysService } from "./api-keys.service";
+
+@Controller("api-keys")
+@UseGuards(AuthGuard)
+export class ApiKeysController {
+	constructor(private readonly apiKeysService: ApiKeysService) {}
+
+	@Post()
+	create(
+		@Req() req: AuthenticatedRequest,
+		@Body("name") name: string,
+		@Body("expiresAt") expiresAt?: string,
+	) {
+		return this.apiKeysService.create(
+			req.user.sub,
+			name,
+			expiresAt ? new Date(expiresAt) : undefined,
+		);
+	}
+
+	@Get()
+	findAll(@Req() req: AuthenticatedRequest) {
+		return this.apiKeysService.findAll(req.user.sub);
+	}
+
+	@Delete(":id")
+	revoke(@Req() req: AuthenticatedRequest, @Param("id") id: string) {
+		return this.apiKeysService.revoke(req.user.sub, id);
+	}
+}