Add validation for import/export integer params to make sure they are positive

[thongdk8]

Description

This PR adds validation for import/export integer params to make sure they are positive. Intentionally, we don't allow data chunk size to be set to 0, which means the file is loaded in memory before importing as the current implementation. PTAL. Thank you.

Related issues and/or PRs

NA

Changes made

• Add validation for import/export integer params to make sure they are positive

Checklist

The following is a best-effort checklist. If any items in this checklist are not applicable to this PR or are dependent on other, unmerged PRs, please still mark the checkboxes after you have read and understood each item.

• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation to reflect the changes.
• I have considered whether similar issues could occur in other products, components, or modules if this PR is for bug fixes.
• Any remaining open issues linked to this PR are documented and up-to-date (Jira, GitHub, etc.).
• Tests (unit, integration, etc.) have been added for the changes.
• My changes generate no new warnings.
• Any dependent changes in other PRs have been merged and published.

Additional notes (optional)

NA

Release notes

NA

[Copilot]

Pull Request Overview

This PR adds runtime checks to ensure that integer parameters for import/export commands are strictly positive.

• Introduces validatePositiveValue utility and updates import/export commands to use it.
• Adds corresponding tests in CommandLineInputUtilsTest.
• Defines new error codes in CoreError for each validation failure.

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
data-loader/cli/src/main/java/com/scalar/db/dataloader/cli/util/CommandLineInputUtils.java	Added validatePositiveValue method and Javadoc
data-loader/cli/src/test/java/com/scalar/db/dataloader/cli/util/CommandLineInputUtilsTest.java	Added tests covering positive, zero, and negative cases
data-loader/cli/src/main/java/com/scalar/db/dataloader/cli/command/dataimport/ImportCommand.java	Hooked up positive-value checks for import options
data-loader/cli/src/main/java/com/scalar/db/dataloader/cli/command/dataexport/ExportCommand.java	Hooked up positive-value checks for export options
core/src/main/java/com/scalar/db/common/error/CoreError.java	Added new error codes for invalid parameter values

Comments suppressed due to low confidence (2)

data-loader/cli/src/main/java/com/scalar/db/dataloader/cli/util/CommandLineInputUtils.java:57

• The Javadoc for validatePositiveValue is missing a @param error tag and the closing tag * @*/ is incorrect. Replace * @*/ with */ and add @param error the CoreError to report when the value is not positive.

* @*/

core/src/main/java/com/scalar/db/common/error/CoreError.java:914

• All four new error constants share the same code "0205", which can cause collisions in error handling. Assign unique codes for each distinct error.

DATA_LOADER_INVALID_DATA_CHUNK_SIZE(

[komamitsu]

LGTM! 👍

[brfrn169]

Left a minor comment. Other than that, LGTM! Thank you!

[inv-jishnu]

LGTM!
Thank you.

[ypeckstadt]

LGTM. Thank you.

[Torch3333]

LGTM, thank you!