The GitHub Actions job "License Binary Checker" on texera.git/main has failed.
Run started by GitHub user bobbai00 (triggered by bobbai00).

Head commit for run:
b9bbf0db799c0867594e20181dd5a7a6bee38826 / Matthew B. <[email protected]>
fix: admin-adjustable max columns with a clear overflow message (#4669)

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### What changes were proposed in this PR?
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- **Admin-adjustable max columns.** Adds `csv_parser_max_columns` to
Admin → Settings → Result Panel. The CSV scan operator reads this from
`site_settings` at runtime.
- **Readable overflow error.** When a CSV row exceeds the limit, the
operator now throws `RuntimeException("Max columns of N exceeded.")`
Instead of letting Univocity's raw stack trace through. Detection looks
at the cause
(`ArrayIndexOutOfBoundsException`) and parses the index from both the
Java 8 and Java 9+ message formats — needed because Univocity's own hint
string is silently dropped on Java 9+.
- **Refactor.** Extracts the repeated "read int/long from
`site_settings` with fallback" pattern into `common/dao/SiteSettings`,
replacing inline jOOQ in `CSVScanSourceOpExec` and `DatasetResource`.
### Any related issues, documentation, discussions?
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closes #4589
Related #3825
### How was this PR tested?
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- New `CSVScanSourceOpExecSpec`: happy path, end-of-input, overflow
translation against a real parser, and `isColumnOverflow` cases for both
AIOOBE message formats.
- Expanded `admin-settings.component.spec.ts` for load/save/reset of the
max columns setting.
- `sbt Test/compile` clean across DAO, ConfigService, WorkflowOperator,
FileService. Frontend specs need Node ≥ 20.19 to run.
- Manual: lowered the limit, ran a workflow on a CSV that exceeded it,
confirmed the result panel shows `Max columns of N exceeded.`
### Was this PR authored or co-authored using generative AI tooling?
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  Co-authored with: Claude Opus 4.7

---------

Co-authored-by: Chen Li <[email protected]>
Co-authored-by: Xinyuan Lin <[email protected]>

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