fix: ScannedKeyRecord.AdoptedApiKeyId als string (UUID), verwaiste Referenzen bei Key-Löschung bereinigen

Services/DatabaseService.Integrations.cs

@@ -423,6 +423,14 @@ public partial class DatabaseService
     public async Task DeleteApiKey(string keyId)
     {
         using var conn = CreateConnection();
+        // Scanned-Keys die auf diesen API-Key verweisen zurücksetzen
+        await conn.ExecuteAsync(
+            "UPDATE scanned_keys SET adopted_api_key_id = NULL WHERE adopted_api_key_id = (SELECT id FROM api_keys WHERE key_id = @keyId)",
+            new { keyId });
+        // User die diesen Key ausgewählt haben zurücksetzen
+        await conn.ExecuteAsync(
+            "UPDATE users SET selected_api_key_id = NULL WHERE selected_api_key_id = @keyId",
+            new { keyId });
         await conn.ExecuteAsync("DELETE FROM api_keys WHERE key_id = @keyId", new { keyId });
     }