add get_agglomerate_graph to annotation

[valentin-pinkau]

Description:

• This PR adds get_agglomerate_graph the Annotation class.

Todos:

Make sure to delete unnecessary points or to check all before merging:

• Updated Changelog
• Added / Updated Tests

[github-actions]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
10237	8399	82%	80%	🟢

New Files

File	Coverage	Status
webknossos/webknossos/proofreading/_init_.py	100%	🟢
webknossos/webknossos/proofreading/agglomerate_graph.py	55%	🟢
webknossos/webknossos/proofreading/generated/_init_.py	100%	🟢
webknossos/webknossos/proofreading/generated/agglomerate_graph_pb2.py	28%	🟢
TOTAL	71%	🟢

Modified Files

File	Coverage	Status
webknossos/webknossos/annotation/annotation.py	77%	🟢
webknossos/webknossos/client/api_client/_abstract_api_client.py	90%	🟢
webknossos/webknossos/client/api_client/models.py	100%	🟢
webknossos/webknossos/client/api_client/tracingstore_api_client.py	50%	🟢
TOTAL	79%	🟢

updated for commit: 5b1b9ea by action🐍

[fm3]

Sweet stuff!