Remove customer identifiers from comments, tests, and CHANGELOG

[danielrmerskine]

Replaces customer-derived names in code comments, test fixtures, and one CHANGELOG entry with the technical condition they actually describe. This is a public repo; these names should never have been in it.

• Comments/docstrings in cli/commands/box/dut.py, cli/commands/box/_host_ops.py, cli/commands/utility/install.py, cli/commands/utility/update.py: the example box user is now described as "a box whose login user is not lagerdata", which is the condition the reader actually needs.
• CHANGELOG.md: same substitution in the box-config sudoers entry.
• test/unit/box/test_host_ops.py, test/unit/box/test_box_dut_cli.py: fixture usernames replaced with neutral ones. The replacements preserve the character classes each fixture exercises (the valid-username list still covers a hyphen+digit name; the invalid-username list still covers an embedded space). One test renamed to drop a customer reference in its name.

No behavior change: every hit was a comment or a fixture string, and no assertion logic depends on the values.

Verification

• The two affected test files: 41 passed.
• Full box unit suite: 3 failed / 898 passed on this branch, and identical on unmodified main. All three failures (test_box_authorize, test_lock_state, test_monitor_state) are pre-existing and in files this PR does not touch.
• A grep for the removed identifiers over the branch tree returns zero hits.

[gemini-code-assist]

Code Review

This pull request generalizes comments, documentation, and unit tests by replacing specific references to "juultest" with generic terms like "boxes with a different login user" or "benchtest". A minor formatting issue was introduced in cli/commands/utility/install.py where a comment line was accidentally merged with the previous line, which should be split back into two lines to restore readability.

Important

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[gemini-code-assist]

The comment line was accidentally joined with the next line, resulting in a nested comment marker (#) and poor formatting. Please split it back into two lines for readability.

Suggested change

	# content. Failure here is a warning, not fatal — the box is otherwise # installed; the operator can apply the rule manually later.
	# content. Failure here is a warning, not fatal — the box is otherwise
	# installed; the operator can apply the rule manually later.