Use Borg known_hosts in restore tests

ops/restore-tests/common.sh

@@ -25,7 +25,7 @@ latest_archive_name() {
 import sqlite3
 conn = sqlite3.connect('/data/borg.db')
 cur = conn.cursor()
-cur.execute("select archive_name from backup_jobs where status='completed' order by created_at desc limit 1")
+cur.execute("select archive_name from backup_jobs where status in ('completed', 'completed_with_warnings') order by created_at desc limit 1")
 row = cur.fetchone()
 if not row:
     raise SystemExit("No completed borg archive found")
@@ -59,10 +59,16 @@ conn = sqlite3.connect('/data/borg.db')
 cur = conn.cursor()
 cur.execute("select path from repositories where path is not null and path != '' order by id asc limit 1")
 repo = cur.fetchone()[0]
-cur.execute("select archive_name from backup_jobs where status='completed' order by created_at desc limit 1")
+cur.execute("select archive_name from backup_jobs where status in ('completed', 'completed_with_warnings') order by created_at desc limit 1")
 archive = cur.fetchone()[0]
 with open('/local/secrets/borg_repo_passphrase.txt', 'r', encoding='utf-8') as f:
     os.environ['BORG_PASSPHRASE'] = f.read().strip()
+known_hosts = '/data/known_hosts'
+if os.path.exists(known_hosts):
+    os.environ.setdefault(
+        'BORG_RSH',
+        f'ssh -o UserKnownHostsFile={known_hosts} -o StrictHostKeyChecking=yes',
+    )
 os.makedirs(extract_dir, exist_ok=True)
 os.chdir(extract_dir)
 subprocess.run(['borg', 'extract', f'{repo}::{archive}', *paths], check=True)