fix(configurator): reviewed bounded DNS role explanations

[lweberru]

Summary

• Release 38978643976 remained blocked: 112/114 cases passed, both DNS role-advice repetitions truncated; continuous dialogue passed 13/13. Preserve that failure, do not retry it unchanged.
• Reuse the existing reviewed field-overview path for native DNS enum meanings, authoritative roles versus visibility, and the unsupported Secondary primary-server configuration.
• Keep explicit requests to complete remaining DNS settings in the draft/proposal path, not informational advice. No regex routing, relaxed oracle, increased output limit or execution-gate change.

Verification

• npm run check: 817 passed, 66 environment-dependent skips.
• Actual release model Qwen/Qwen3-VL-235B-A22B-Instruct-FP8: every DNS case twice, 16/16 (including role correction, Secondary boundary, draft creation and all saved/login/placeholder contact sources); VPN 2/2 and DevOps 2/2.
• Reviewed DNS explanations are 1429 characters, no questions/changes; one intent request and the unchanged role/Secondary oracles are tested.
• Earlier failed local DNS proposal repetition is preserved; the final source makes proposal priority explicit.

A fresh manual Development release still needs complete repeated qualification and all build/deploy gates. No production deployment or customer Apply.