fix(meta): rename --license-key-file to --license-key-path

[BugenZhao]

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What's changed and what's your intention?

The new argument introduced in #18768 was mistakenly named --license-key-file, while the env var and internal names are license_key_path. This PR unifies the naming.

See also:

• feat(meta): watch and reload license key from file #18768 (comment)
• feat: support passing license as file risingwave-operator#732

Checklist

• I have written necessary rustdoc comments
• I have added necessary unit tests and integration tests
• All checks passed in ./risedev check (or alias, ./risedev c)

Documentation

• My PR needs documentation updates. (Please use the Release note section below to summarize the impact on users)

Release note

If this PR includes changes that directly affect users or other significant modifications relevant to the community, kindly draft a release note to provide a concise summary of these changes. Please prioritize highlighting the impact these changes will have on users.

[BugenZhao]

• fix(meta): rename --license-key-file to --license-key-path #18838 👈
• refactor(meta): reject directly setting license key when it's managed by watching a file #18823
• main

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[arkbriar]

LGTM!

[BugenZhao]

Merge activity

• Oct 11, 12:47 AM EDT: A user started a stack merge that includes this pull request via Graphite.
• Oct 11, 12:47 AM EDT: Graphite couldn't merge this pull request because a downstack PR refactor(meta): reject directly setting license key when it's managed by watching a file #18823 failed to merge.