Add README documentation and Claude changelog

- Fill README.md with comprehensive project documentation
- Add docs/changelog-claude.md for tracking Claude Code changes

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

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+# BackupChecks
+
+A backup monitoring and compliance application designed for Managed Service Providers (MSPs) and IT departments.
+
+## Features
+
+### Mail Ingestion & Parsing
+- Automated email import from Microsoft Graph API (Office 365)
+- Supports 11 backup software platforms:
+  - Veeam (including SOBR capacity monitoring)
+  - Synology
+  - QNAP
+  - Nakivo
+  - Syncovery
+  - Boxafe
+  - R-Drive
+  - 3CX
+  - NTFS Auditing
+  - And more
+- Intelligent email parsing extracts backup metadata
+- Raw EML storage for debugging with configurable retention
+
+### Backup Job Tracking
+- Dashboard with daily backup job status summaries
+- Expected vs. actual job runs based on schedules
+- Missed backup detection
+- Status tracking: Success, Warning, Error, Missed
+- Timezone-aware calculations (defaults to Europe/Amsterdam)
+
+### Run Checks & Review Workflow
+- Manual review interface for backup failures
+- Mark runs as "reviewed"
+- Approval workflow for backup email processing
+- Storage capacity monitoring
+- Autotask PSA ticket integration
+
+### Override Rules
+- Exception rules at global or job-level
+- Matching criteria: status, error message patterns
+- Validity windows for temporary overrides
+
+### Multi-Customer Management
+- Organize jobs by customer
+- Autotask company mapping
+- Customer-scoped reporting and permissions
+
+### Tickets & Remarks
+- Internal ticket system for backup issues
+- Automatic linking to affected job runs
+- Scope-based ticket resolution
+- Feedback/feature request board
+
+### Reporting & Analytics
+- Snapshot-based reporting with configurable periods
+- Historical success rates and trend analysis
+- CSV export functionality
+
+### Autotask Integration
+- Create PSA tickets from failed backup runs
+- Link internal tickets to Autotask
+- Deep links back to BackupChecks
+
+### User Management
+- Role-based access control (admin, viewer, custom roles)
+- Theme preferences (light/dark/auto)
+- In-app news/announcements
+
+## Technology Stack
+
+**Backend:**
+- Flask 3.0.3 (Python)
+- SQLAlchemy with PostgreSQL 16
+- Flask-Login for authentication
+- Gunicorn server
+
+**Frontend:**
+- Jinja2 templates (server-side rendering)
+- Bootstrap-based responsive UI
+- JavaScript/AJAX for dynamic interactions
+
+**Infrastructure:**
+- Docker containerized
+- PostgreSQL database
+- Adminer for database management
+
+## Project Structure
+
+```
+backupchecks/
+├── containers/backupchecks/
+│   ├── Dockerfile
+│   ├── requirements.txt
+│   └── src/
+│       ├── backend/app/
+│       │   ├── main.py          # Entry point
+│       │   ├── models.py        # Database models
+│       │   ├── parsers/         # Backup software parsers
+│       │   ├── integrations/    # Autotask integration
+│       │   └── main/            # Route handlers
+│       ├── templates/           # Jinja2 templates
+│       └── static/              # CSS, JS, assets
+├── deploy/
+│   └── backupchecks-stack.yml   # Docker Compose
+└── docs/                        # Documentation
+```
+
+## Deployment
+
+The application runs as a Docker stack in Portainer.
+
+## Configuration
+
+Key settings are managed via the web interface under Settings:
+- Mail import configuration (Microsoft Graph API)
+- Autotask integration credentials
+- Timezone settings
+- User management
+
+## License
+
+See [LICENSE](LICENSE) file.

docs/changelog-claude.md

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+# Changelog - Claude Code
+
+This file documents all changes made to this project via Claude Code.
+
+## [2026-02-04]
+
+### Added
+- `docs/changelog-claude.md` - Changelog file for tracking changes made via Claude Code
+
+### Changed
+- Converted changelog to English (all project documentation must be in English)
+- Documented branch naming convention and build workflow in Claude memory
+- Filled README.md with comprehensive project documentation based on source code analysis