System-Components.md

+# System Components
+
+## Core Modules
+
+### Daily Scheduler
+
+The daily scheduler (`daily_scheduler.py`) manages all scheduled tasks:
+
+- **Queue Sync** (1:00 PM) - Syncs user consents from Bohrium API
+- **Pre-Migration Emails** (1:30 PM) - Sends notification emails
+- **AD Group Management** (5:30 PM) - Updates Active Directory groups
+- **Migration Execution** (6:00 PM) - Executes PST export and GWME migration
+
+### Orchestrator
+
+The orchestrator (`orchestrator.py`) coordinates the migration workflow:
+
+- Manages migration execution across multiple servers
+- Handles error recovery and retries
+- Tracks migration progress and status
+
+### Remote Executor
+
+The remote executor (`remote_executor.py`) handles remote operations:
+
+- PST export triggering on Hafnium
+- GWME monitoring and triggering
+- Server status monitoring
+
+### Xenon Executor
+
+The Xenon executor (`xenon_executor.py`) manages GCDS synchronization:
+
+- Triggers GCDS task on Xenon server
+- Monitors GCDS sync completion
+- Handles errors and timeouts
+
+## Database Schema
+
+### Tables
+
+- **migration_queue** - User migration queue
+- **migration_batch** - Migration batches
+- **batch_assignment** - Batch-to-server assignments
+- **migration_server** - Server registry
+- **migration_log** - Migration execution logs
+- **sync_state** - Bohrium API sync state
+
+## Configuration
+
+Configuration is managed through `.env` file and `config.py`:
+
+- API endpoints and credentials
+- Server hostnames and credentials
+- Scheduler timing
+- Migration settings
+
+---
+
+**See also:** [Architecture](Architecture.md), [Configuration](Configuration.md)
+