Summary

Follow-up to #475 based on an adversarial review of the merged Warden redesign.

• drain queued Warden responses before advancing their deadlines, while preventing elapsed time from being charged to a state entered during the same world tick
• reject check plans whose maximum client result exceeds the exact 10,229-byte transport body budget
• distinguish transport overflow from the inner uint16 result limit in catalogue diagnostics
• centralize and compile-time pin the Classic CHECK_RESULT framing invariants

Verification

• built mangosd and mangos_tests in RelWithDebInfo
• full aggregate unit run: 309 tests passed
• CTest: 15/15 passed
• proto_boundary, build_policy, and warden_boundary passed
• each commit received a bounded Claude Opus 5 Max review; no blocking or unresolved important findings remain

No database, configuration, or submodule changes are included.

This change is