Initialize environment configuration and enhance API logging

- Added a new .env file for environment variables including database and Redis configurations.
- Updated CLAUDE.md with hard rules for development practices.
- Enhanced package.json with new scripts for development and infrastructure management.
- Integrated Pino for structured logging in the API, replacing the default NestJS logger.
- Implemented OpenTelemetry for tracing and monitoring in the API.
- Added durationMinutes field to the Mission model in Prisma schema and created corresponding migration.
- Updated missions controller and service to handle mission duration and abandonment logic.
- Introduced new logger module for consistent logging across the application.

apps/api/prisma/schema.prisma

@@ -37,6 +37,7 @@ model Mission {
   groupId                 String?              @map("group_id") @db.Uuid
   channelId               String               @map("channel_id")
   difficulty              Int                  @db.SmallInt
+  durationMinutes         Int                  @default(20) @map("duration_minutes") @db.SmallInt
   status                  String               @default("active")
   encounterLibraryVersion String               @map("encounter_library_version")
   startedAt               DateTime             @default(now()) @map("started_at")