implemented LE and ACME and fixed some bugs

docs/DB_COMMANDS.md

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+# SQLite Datenbank-Befehle
+
+## Verbindung zur Datenbank
+
+Die Datenbank liegt in: `./backend/spaces.db`
+
+### Verbindung herstellen:
+```bash
+cd /home/nick/Development/certigo-addon/backend
+sqlite3 spaces.db
+```
+
+## Nützliche SQLite-Befehle
+
+### Tabellen auflisten:
+```sql
+.tables
+```
+
+### Schema einer Tabelle anzeigen:
+```sql
+.schema audit_logs
+```
+
+### Alle Audit-Logs anzeigen:
+```sql
+SELECT * FROM audit_logs ORDER BY timestamp DESC LIMIT 10;
+```
+
+### Anzahl der Audit-Logs:
+```sql
+SELECT COUNT(*) FROM audit_logs;
+```
+
+### Letzte 5 Audit-Logs mit Details:
+```sql
+SELECT 
+    timestamp,
+    username,
+    action,
+    resource_type,
+    details
+FROM audit_logs 
+ORDER BY timestamp DESC 
+LIMIT 5;
+```
+
+### Einen spezifischen Audit-Log anzeigen (nach ID):
+```sql
+SELECT * FROM audit_logs WHERE id = 'LOG_ID_HIER';
+```
+
+### Einen spezifischen Audit-Log anzeigen (nach Timestamp):
+```sql
+SELECT * FROM audit_logs WHERE timestamp = '2025-11-20 16:20:00';
+```
+
+### Audit-Logs nach Aktion filtern:
+```sql
+SELECT * FROM audit_logs WHERE action = 'CREATE' ORDER BY timestamp DESC;
+```
+
+### Audit-Logs nach Ressourcentyp filtern:
+```sql
+SELECT * FROM audit_logs WHERE resource_type = 'user' ORDER BY timestamp DESC;
+```
+
+### Audit-Logs nach Benutzer filtern:
+```sql
+SELECT * FROM audit_logs WHERE username = 'admin' ORDER BY timestamp DESC;
+```
+
+### Vollständige Details eines Logs (formatiert):
+```sql
+SELECT 
+    id,
+    timestamp,
+    user_id,
+    username,
+    action,
+    resource_type,
+    resource_id,
+    details,
+    ip_address,
+    user_agent
+FROM audit_logs 
+WHERE id = 'LOG_ID_HIER';
+```
+
+### Neueste Logs mit formatierten Details:
+```sql
+SELECT 
+    datetime(timestamp) as zeit,
+    username,
+    action,
+    resource_type,
+    json_extract(details, '$.message') as nachricht,
+    ip_address
+FROM audit_logs 
+ORDER BY datetime(timestamp) DESC 
+LIMIT 10;
+```
+
+### Logs der letzten Stunde:
+```sql
+SELECT * FROM audit_logs 
+WHERE datetime(timestamp) >= datetime('now', '-1 hour')
+ORDER BY timestamp DESC;
+```
+
+### Logs von heute:
+```sql
+SELECT * FROM audit_logs 
+WHERE date(timestamp) = date('now')
+ORDER BY timestamp DESC;
+```
+
+### Alle Tabellen auflisten:
+```sql
+SELECT name FROM sqlite_master WHERE type='table';
+```
+
+### Prüfen ob audit_logs Tabelle existiert:
+```sql
+SELECT name FROM sqlite_master WHERE type='table' AND name='audit_logs';
+```
+
+### Alle Spalten der audit_logs Tabelle:
+```sql
+PRAGMA table_info(audit_logs);
+```
+
+### SQLite verlassen:
+```sql
+.quit
+```
+oder
+```sql
+.exit
+```
+
+## Direkte Befehle (ohne interaktive Shell)
+
+### Anzahl der Logs:
+```bash
+sqlite3 backend/spaces.db "SELECT COUNT(*) FROM audit_logs;"
+```
+
+### Letzte 5 Logs:
+```bash
+sqlite3 backend/spaces.db "SELECT timestamp, username, action, resource_type, details FROM audit_logs ORDER BY timestamp DESC LIMIT 5;"
+```
+
+### Prüfen ob Tabelle existiert:
+```bash
+sqlite3 backend/spaces.db "SELECT name FROM sqlite_master WHERE type='table' AND name='audit_logs';"
+```
+
+### Alle Logs als CSV exportieren:
+```bash
+sqlite3 -header -csv backend/spaces.db "SELECT * FROM audit_logs ORDER BY timestamp DESC;" > audit_logs.csv
+```
+
+### Einen spezifischen Log anzeigen (Beispiel):
+```bash
+sqlite3 backend/spaces.db "SELECT * FROM audit_logs WHERE id = '5d424293-14c1-48ef-a34c-5555d843d289';"
+```
+
+### Neueste 10 Logs mit Details:
+```bash
+sqlite3 -header -column backend/spaces.db "SELECT timestamp, username, action, resource_type, details FROM audit_logs ORDER BY timestamp DESC LIMIT 10;"
+```
+
+### Logs nach Aktion filtern:
+```bash
+sqlite3 -header -column backend/spaces.db "SELECT * FROM audit_logs WHERE action = 'CREATE' ORDER BY timestamp DESC LIMIT 10;"
+```
+
+### Logs nach Benutzer filtern:
+```bash
+sqlite3 -header -column backend/spaces.db "SELECT * FROM audit_logs WHERE username = 'admin' ORDER BY timestamp DESC LIMIT 10;"
+```
+
+### Logs von heute:
+```bash
+sqlite3 -header -column backend/spaces.db "SELECT * FROM audit_logs WHERE date(timestamp) = date('now') ORDER BY timestamp DESC;"
+```
+
+### JSON-Details eines Logs formatiert anzeigen:
+```bash
+sqlite3 backend/spaces.db "SELECT json_pretty(details) FROM audit_logs WHERE id = 'LOG_ID_HIER';"
+```
+
+**Hinweis**: Falls `json_pretty` nicht verfügbar ist, verwende stattdessen:
+```bash
+sqlite3 backend/spaces.db "SELECT details FROM audit_logs WHERE id = 'LOG_ID_HIER';" | python3 -m json.tool
+```
+