Migration Workflow hinzugefügt

Migration-Workflow.md

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+# Migration Workflow
+
+This page describes the target migration workflow from an existing Romexis server into the Docker-based Romexis stack.
+
+---
+
+## Source System
+
+The source system is usually a Windows-based Romexis server.
+
+Required data:
+
+```text
+SQL Server database backup (.bak)
+Romexis image directory
+Romexis ergo data directory
+optional Romexis cache directory
+```
+
+The cache directory is optional because it can usually be regenerated.
+
+---
+
+## Target System
+
+The target system runs:
+
+```text
+Romexis Server container
+Database backend container
+Migration Service container
+Persistent data volumes
+```
+
+---
+
+## Workflow Overview
+
+```text
+Existing Romexis Server
+        |
+        | database backup
+        | image data
+        | ergo data
+        v
+Romexis Migration Service
+        |
+        | validation
+        | database restore
+        | data restore
+        v
+Docker-based Romexis Server
+```
+
+---
+
+## Manual Workflow
+
+1. Open the migration Web UI.
+2. Create a new migration job.
+3. Upload the database backup in the browser.
+4. Let the service create `manifest.json`.
+5. Trigger database restore.
+6. Upload images and ergo data via SFTP.
+7. Mark upload complete.
+8. Validate uploaded data.
+9. Run restore.
+10. Complete migration.
+11. SFTP credentials are removed or disabled.
+
+---
+
+## Client-Assisted Workflow
+
+The migration client is intended to automate most source-side steps:
+
+1. detect Romexis installation
+2. detect database configuration
+3. detect data directories
+4. create or use a migration job
+5. create database backup
+6. upload data through rclone/SFTP
+7. call API endpoints to advance the workflow
+8. show logs and restore status
+
+---
+
+## Expected Upload Layout
+
+```text
+/upload/
+├── meta/
+│   └── manifest.json
+├── database/
+│   └── Romexis_db.bak
+├── romexis_images/
+├── romexis_ergodata/
+└── romexis_cache/
+```
+
+---
+
+## Manifest
+
+The manifest describes the uploaded migration data.
+
+Example:
+
+```json
+{
+  "migration_id": "example",
+  "name": "Example Migration",
+  "source_host": "old-romexis-server",
+  "database": {
+    "backup": "database/Romexis_db.bak"
+  },
+  "romexis_images": true,
+  "romexis_ergodata": true,
+  "romexis_cache": false
+}
+```
+
+The manual browser workflow can generate this automatically after database upload.
+
+---
+
+## Validation
+
+Validation should check:
+
+- manifest exists
+- database backup exists
+- image directory exists
+- ergo data directory exists
+- optional cache directory exists if requested
+- file counts
+- total bytes
+- future checksum data
+
+---
+
+## Restore
+
+The restore step performs or coordinates:
+
+1. database restore
+2. file placement into target volumes
+3. permission fixes
+4. Romexis restart
+5. final status reporting
+
+---
+
+## Completion
+
+After successful restore, the job should be marked completed.
+
+Completion should:
+
+- remove or disable temporary SFTP user
+- hide workflow action buttons
+- keep logs available
+- preserve migration state file for audit/debugging