[codex] Add MetaReview demo SQL change

[prantikmedhi]

Summary

Adds a small SQL demo file that references users.email so MetaReview has a SQL-bearing pull request to analyze.

Why

This triggers the MetaReview PR Guardrail workflow and should produce a PR comment using the configured OpenMetadata sandbox and Gemini secrets.

Validation

• PYTHONPATH=src python3 -m unittest discover -s tests

[github-actions]

MetaReview Bot

Impact Score: LOW (1.0/10)

Summary

MetaReview assessed this PR as LOW risk with score 1.0/10.

Risks

• No critical metadata risks detected from available context.

Impact

• SQL-bearing files analyzed: demo/metareview_demo.sql, tests/test_github_client.py, tests/test_parsing.py, tests/test_review.py
• Referenced tables: README, future, acme_nexus_raw_data, acme_nexus_raw_data.acme_raw.crm.customers, api, c, client, crm, crm.customers, crm.orders, customer_health, customer_orders, customers, dashboard, file_100, metareview, metareview.github_client, metareview.metadata, metareview.parsing, metareview.review, metareview_demo, model, o, orders, parsed, raw, risk, self, session, typing, unittest

Recommended Action

• Validate schema compatibility before merge.
• Confirm downstream owners are aware if lineage impact is expected.