feat: reword phase to epic, update mkdocs

docs/content/stories/epic5/5.5-scheduler-jobs.md

@@ -0,0 +1,74 @@
+# Story 5.5: Scheduler and Background Jobs System
+
+## Metadata
+- **Story ID**: 5.5
+- **Title**: Scheduler and Background Jobs System
+- **Epic**: 5 - Infrastructure Adapters
+- **Status**: Pending
+- **Priority**: High
+- **Estimated Time**: 6-8 hours
+- **Dependencies**: 1.1, 5.1
+
+## Goal
+Implement a complete scheduler and background job system with cron jobs, job queues, retries, and job status tracking.
+
+## Description
+This story implements a scheduler system using Asynq (Redis-backed) that supports cron jobs for periodic tasks and job queues for background processing. Jobs can be registered from modules and tracked.
+
+## Deliverables
+
+### 1. Scheduler Interface (`pkg/scheduler/scheduler.go`)
+- `Scheduler` interface with:
+  - `Cron(spec string, job JobFunc) error` - Schedule cron job
+  - `Enqueue(queue string, payload any) error` - Enqueue job
+  - `RegisterJob(name string, handler JobHandler) error` - Register job handler
+
+### 2. Asynq Implementation (`internal/infra/scheduler/asynq_scheduler.go`)
+- Redis-backed job queue
+- Cron jobs for periodic tasks
+- Job retries and backoff
+- Job status tracking
+- Job result storage
+
+### 3. Job Registry (`internal/infra/scheduler/job_registry.go`)
+- Register jobs from modules
+- Start job processor on app startup
+- Job lifecycle management
+
+### 4. Example Jobs
+- Cleanup expired tokens (daily)
+- Send digest emails (weekly)
+- Database cleanup tasks
+
+### 5. Job Monitoring API
+- `GET /api/v1/jobs/status` - Job status endpoint
+- Job history and statistics
+
+### 6. Configuration
+- Scheduler config in `config/default.yaml`:
+  - Redis connection (shared with cache)
+  - Concurrency settings
+  - Retry settings
+
+### 7. DI Integration
+- Provider function for Scheduler
+- Register in DI container
+
+## Acceptance Criteria
+- [ ] Scheduler interface is defined
+- [ ] Cron jobs can be scheduled
+- [ ] Jobs can be enqueued
+- [ ] Jobs are processed correctly
+- [ ] Job retries work
+- [ ] Job status is tracked
+- [ ] Example jobs run on schedule
+- [ ] Job monitoring API works
+
+## Files to Create/Modify
+- `pkg/scheduler/scheduler.go` - Scheduler interface
+- `internal/infra/scheduler/asynq_scheduler.go` - Asynq implementation
+- `internal/infra/scheduler/job_registry.go` - Job registry
+- `internal/infra/scheduler/jobs.go` - Example jobs
+- `internal/di/providers.go` - Add scheduler provider
+- `config/default.yaml` - Add scheduler config
+