Backport to branch(3.13) : Adjust precision of mapped datatype for ScalarDB BIGINT on Oracle

[feeblefakie]

This is an automated request for a manual backport of the following:

• Original PR: Adjust precision of mapped datatype for ScalarDB BIGINT on Oracle #2566
• Commit to backport: d18e647

1. Resolve any conflicts that occur during the cherry-picking process.

git fetch origin &&
git checkout 3.13-pull-2566 &&
git cherry-pick --no-rerere-autoupdate -m1 d18e64797862f449141aa3a21f6e08b8308ba152

2. Push the changes.
3. Merge this PR after all checks have passed.

Thank you!