fix: CDC integration test failures after schema metadata changes

[Jeffail]

• mysql_cdc: handle plain int and uint types in mapMessageColumn, which the MySQL CDC library can return for number columns
• postgres_cdc: strip schema metadata in TestIntegrationPostgresMetadata since it is tested separately in TestIntegrationPostgresCDCSchemaMetadata

[claude]

Claude finished @Jeffail's task in 49s —— View job

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Commits

1. fix: CDC integration test failures after schema metadata changes — The fix: prefix is not a recognized system name. Per commit policy, valid formats are system: message (with a known area), chore: message, or sentence-case for repo-wide changes. Since this touches both mysql and postgresql, a sentence-case message like Fix CDC integration test failures after schema metadata changes would be appropriate, or split into two system-scoped commits.

Review

Small, focused fix handling two CDC integration test issues. The MySQL change adds int and uint type switch cases consistent with the existing pattern. The PostgreSQL change strips schema metadata from a test that doesn't need to assert on it.

LGTM