feat: implement structured logging for server and client

Server:
- Add pino and pino-http for structured logging
- Create @Logged class decorator using Proxy pattern for automatic method logging
- Add pino redact config for sensitive data (password, token, etc.)
- Move AuthMiddleware to controllers folder (per architecture diagram)
- Add LoggingMiddleware for HTTP request logging
- Replace console.log/error with structured logger in controllers and app.ts
- Decorate all repositories and GPTAdapter with @Logged

Client:
- Add react-native-logs with namespaced loggers (apiLogger, storeLogger)
- Add request/response logging to ApiClient with duration tracking

apps/server/src/repositories/mongo/MongoChatRepository.ts

@@ -6,8 +6,10 @@ import {
   UpdateMessageDTO,
 } from "@caldav/shared";
 import { ChatRepository } from "../../services/interfaces";
+import { Logged } from "../../logging";
 import { ChatMessageModel, ConversationModel } from "./models";
 
+@Logged("MongoChatRepository")
 export class MongoChatRepository implements ChatRepository {
   // Conversations
   async getConversationsByUser(userId: string): Promise<Conversation[]> {

apps/server/src/repositories/mongo/MongoEventRepository.ts

@@ -1,7 +1,9 @@
 import { CalendarEvent, CreateEventDTO, UpdateEventDTO } from "@caldav/shared";
 import { EventRepository } from "../../services/interfaces";
+import { Logged } from "../../logging";
 import { EventModel } from "./models";
 
+@Logged("MongoEventRepository")
 export class MongoEventRepository implements EventRepository {
   async findById(id: string): Promise<CalendarEvent | null> {
     const event = await EventModel.findById(id);

apps/server/src/repositories/mongo/MongoUserRepository.ts

@@ -1,7 +1,9 @@
 import { User } from "@caldav/shared";
 import { UserRepository, CreateUserData } from "../../services/interfaces";
+import { Logged } from "../../logging";
 import { UserModel } from "./models";
 
+@Logged("MongoUserRepository")
 export class MongoUserRepository implements UserRepository {
   async findById(id: string): Promise<User | null> {
     throw new Error("Not implemented");