Issue: go bufio.scanner GPO size too large

[casual-lemon]

Is there an existing issue for this?

• I have searched the existing issues and found none that matched mine

Describe the issue

There is a GPO object that is being applied to about ~1000 windows vms, its size is ~476KB in size and we see an error with adsysctl
after running adsysctl update -m

ERROR Error from server: error while updating policy: can't get policies for "hostname redacted": one or more error while parsing downloaded elements: /var/cache/adsys/sysvol/Policies/{UUID redacted}/Machine/Registry.pol: can't parse policy: invalid policy: bufio.Scanner: token too long

Steps to reproduce it

In a ubuntu vm use adsysctl update -m -vvv on a large GPO object in windows AD.

Ubuntu users: System information

report.txt

Non Ubuntu users: System information

Environment

• adsys version: 0.16.0ubuntu1`
• Distribution: plucky
• Distribution version: 25.04

Log files

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adsysctl service cat -vvv
INFO github.com/ubuntu/adsys/internal/config/config.go:79 Init() Using configuration file: /etc/adsys.yaml 
DEBUG Connecting as [[2924:773482]]                
DEBUG github.com/ubuntu/adsys/internal/grpc/logconnections/logconnections.go:28 (*Service).RegisterGRPCServer.StreamServerInterceptor.func3() New request /service/Cat 
DEBUG github.com/ubuntu/adsys/internal/grpc/logconnections/logconnections.go:61 loggedServerStream.RecvMsg() Requesting with parameters:  
DEBUG github.com/ubuntu/adsys/internal/authorizer/authorizer.go:112 Authorizer.IsAllowedFromContext() Check if grpc request peer is authorized 
DEBUG github.com/ubuntu/adsys/internal/authorizer/authorizer.go:203 Authorizer.isAllowed() Polkit call result, authorized: true 

[adsysctl.txt](https://github.com/user-attachments/files/18680013/adsysctl.txt)

Application settings

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Paste the contents of your adsys.yaml file here, if you created one.

Additional information

No response

Double check your logs

• I have redacted any sensitive information from the logs