Fix: whole knowledge graph lost after removing any document in the knowledge base (#7151)
### What problem does this PR solve?
When you removed any document in a knowledge base using knowledge graph,
the graph's `removed_kwd` is set to "Y".
However, in the function `graphrag.utils.get_gaph`, `rebuild_graph`
method is passed and directly return `None` while `removed_kwd=Y`,
making residual part of the graph abandoned (but old entity data still
exist in db).
Besides, infinity instance actually pass deleting graph components'
`source_id` when removing document. It may cause wrong graph after
rebuild.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
Fix:When parsing documents with graph, an error occurred:[ERROR][Exception]: 'method' (#6836)
[When parsing documents with graph, an error
occurred:[ERROR][Exception]: 'method']
(https://github.com/infiniflow/ragflow/issues/6835)
### What problem does this PR solve?
Close #6786
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
- [ ] New Feature (non-breaking change which adds functionality)
- [ ] Documentation Update
- [ ] Refactoring
- [ ] Performance Improvement
- [ ] Other (please describe):
Co-authored-by: cm <caiming@sict.ac.cn>
### What problem does this PR solve?
Removed set_entity and set_relation to avoid accessing doc engine during
graph computation.
Introduced GraphChange to avoid writing unchanged chunks.
### Type of change
- [x] Performance Improvement
Fix: split process bug in graphrag extract (#6423)
### What problem does this PR solve?
1. miss completion delimiter.
2. miss bracket process.
3. doc_ids return by update_graph is a set, and insert operation in
extract_community need a list.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
alkscr
Stephen Hu
caiming100
Zhichang Yu
utopia2077
Kevin Hu