[fix](fe) give ConfField.description a single string in the streaming-job config

[morningman]

What problem does this PR solve?

Issue Number: close #xxx

Related PR: #66342, #66238

Problem Summary:

master does not compile. fe-common fails at

Config.java:[1177,65] annotation value not of an allowable type

#66342 retyped ConfigBase.ConfField.description() from String[] to String and rewrote all 419 call sites accordingly. #66238 landed shortly after with

@ConfField(mutable = true, masterOnly = true, description = {
        "Minimum interval in seconds between snapshot offset persistence operations"})
public static int streaming_job_snapshot_offset_persist_interval_sec = 300;

written against the older String[] signature. The two changes are textually disjoint, so git merges them without a conflict and neither pull request could see the other — each was green on its own base.

The seven further errors reported in the same module are secondary. The bad annotation value aborts the annotation-processing round, so lombok never contributes its generated members, and @Slf4j's log plus @AllArgsConstructor/@Data's constructors go missing:

DiskUtils.java:[70,13] cannot find symbol
JobBaseConfig ... constructor cannot be applied to given types
AbstractSourceSplit ... constructor cannot be applied to given types

All seven disappear once the annotation value is fixed; nothing else in the tree needed a change.

This is the only remaining array-form description under fe/ (grep -rnE 'description\s*=\s*\{'), and the wrapped-argument layout matches the neighbouring long descriptions such as max_create_table_timeout_second.

ConfigTest.testConfFieldDescriptionsAreEnglishStrings, the guard #66342 added, reflects over the annotation at runtime, so it cannot catch a compile-time signature mismatch; it passes here because the text is already English.

Verified on a clean checkout of master 4e3c1b84dd5:

• reproduced the failure before the change, and confirmed all eight errors are gone after it
• full FE reactor mvn test-compile (checkstyle included): 74/74 modules SUCCESS
• fe-common module tests: 157 tests, 0 failures, 0 skipped, including ConfigTest.testConfFieldDescriptionsAreEnglishStrings
• the tests both colliding PRs added — StreamingInsertJobOffsetPersistenceTest, JdbcSourceOffsetProviderOffsetTest, SessionVariablesTest: 39 tests, 0 failures, 0 skipped

Release note

None

Check List (For Author)

• Test

  • No need to test or manual test. Explain why:
    • Previous test can cover this change.

• Behavior changed:

  • No.

• Does this need documentation?

  • No.

[hello-stephen]

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1. What problem was fixed (it's best to include specific error reporting information). How it was fixed.
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[morningman]

skip buildall

[github-actions]

PR approved by at least one committer and no changes requested.

[github-actions]

PR approved by anyone and no changes requested.