fix: restore test contract lintability

[seonghobae]

Customer outcome

The repository-wide Ruff gate is green again without changing runtime behavior. Directly executable HTTP honesty tests now call their actual test names, the null/empty-functions payload has one unambiguous JSON key, and the security test no longer carries an unused import.

Verification

• ruff check .
• git diff --check
• focused HTTP honesty/security tests: 38 passed

This PR is intentionally independent of the feature stacks. Merge only through the protected current-head review and Checks path; no self-approval or bypass.

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Review details

⚙️ Run configuration

Configuration used: Organization UI

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Run ID: a7a99391-a9e4-4cd7-8764-afc19f8e068f

📥 Commits

Reviewing files that changed from the base of the PR and between e226e11 and 0eb0a9b.

📒 Files selected for processing (4)

• tests/test_chat_tools_shape_http_honesty.py
• tests/test_functions_null_max_tool_calls_null_http_honesty.py
• tests/test_responses_tools_shape_http_honesty.py
• tests/test_security_hardening.py

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[seonghobae]

Exact-head validation — PR #799

• Current HEAD: 0eb0a9b7323b9de17311c0b990838c71de644d00
• Repository-wide ruff check .: passed.
• Focused HTTP honesty/security regressions: 38 passed.
• git diff --check: passed.
• The patch only restores test-contract names, removes an impossible duplicate JSON key, and removes an unused import; runtime production behavior is unchanged.
• Auto-merge is enabled; current live PR remains BLOCKED/REVIEW_REQUIRED while protected Checks and independent approval are pending.

@opencode-agent please review only exact current HEAD 0eb0a9b7323b9de17311c0b990838c71de644d00; verify the lint findings are fully resolved without weakening tests or changing runtime behavior. Do not approve or merge.

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.

[seonghobae]

Superseded by #771 (merged): the identical lint-contract fixes are already on main (84a40cb), so this branch adds zero delta against current main. Closing as redundant; no content is lost.