## Description:
This PR addresses issue #29429 by fixing the _wrap_query method in
langchain_community/graphs/age_graph.py. The method now correctly
handles Cypher queries with UNION and EXCEPT operators, ensuring that
the fields in the SQL query are ordered as they appear in the Cypher
query. Additionally, the method now properly handles cases where RETURN
* is not supported.
### Issue: #29429
### Dependencies: None
### Add tests and docs:
Added unit tests in tests/unit_tests/graphs/test_age_graph.py to
validate the changes.
No new integrations were added, so no example notebook is necessary.
Lint and test:
Ran make format, make lint, and make test to ensure code quality and
functionality.
Description:
Current AGEGraph() implementation does some custom wrapping for graph
queries. The method here is _wrap_query() as it parse the field from the
original query to add some SQL context to it.
This improves the current parsing logic to cover additional edge cases
that are added to the test coverage, basically if any Node property name
or value has the "return" literal in it will break the graph / SQL
query.
We discovered this while dealing with real world datasets, is not an
uncommon scenario and I think it needs to be covered.
**Description:** implemented GraphStore class for Apache Age graph db
**Dependencies:** depends on psycopg2
Unit and integration tests included. Formatting and linting have been
run.
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Co-authored-by: Bagatur <22008038+baskaryan@users.noreply.github.com>
Co-authored-by: Bagatur <baskaryan@gmail.com>
