fix: send_to_session – fremde Sessions erlauben, Telegram-Notify, Fehler-Logging

Services/DatabaseService.cs

@@ -559,6 +559,15 @@ public class DatabaseService
         return session;
     }
 
+    public async Task<SessionRecord> GetSessionByName(string name)
+    {
+        using var conn = CreateConnection();
+        var sessions = await conn.QueryAsync<SessionRecord>(
+            "SELECT * FROM sessions WHERE is_deleted = 0 AND LOWER(name) = LOWER(@name) ORDER BY updated_at DESC LIMIT 1",
+            new { name });
+        return sessions.FirstOrDefault();
+    }
+
     public async Task<List<SessionWithStats>> GetSessionsWithStats(string userId)
     {
         using var conn = CreateConnection();