Fix Reactome release version sentinel

[Chryseisliu]

Description

Fix the Reactome version sentinel for current official graph images. Release 96 stores the release under DBInfo.releaseNumber, while the test only queried the older DBInfo.version property.

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Code quality improvement (refactoring, performance, etc.)

Changes Made

• Read DBInfo.releaseNumber with DBInfo.version as a compatibility fallback.
• Convert the selected value to an integer in Cypher so the existing sanity check remains stable.

Testing

Unit Tests

• Added coverage through the existing database sentinel

Integration Tests

• Ran tests/test_reactome_version.py against the official Reactome Release 96 Neo4j image

Manual Testing

• Verified output: [reactome-version] tests ran against reactome v96

Checklist

• Self-review completed
• No debugging code left in
• No credentials or sensitive information in code
• Git commit message is clear and descriptive

Additional Notes

This is intentionally a small compatibility fix and does not change generated networks.