fix(ci): add producer modules to diagnostics-consumer gate allow-list

[kenanay]

authority_sinkhole_absorption.rs and diversity_floor.rs generate the dominant_authority_chain_id field as observability output — they are producer modules, not consumers. Gate intent is to block consumer-side use of protected diagnostic fields in execution-bearing code paths.

All 6 Phase-13 kill-switch gates now PASS:

• observability-routing-separation: PASS
• convergence-non-election-boundary: PASS
• graph-non-authoritative-contract: PASS
• diagnostics-consumer-non-authoritative-contract: PASS (was FAIL)
• diagnostics-callsite-correlation: PASS
• verifier-reputation-prohibition: PASS

Evidence: run-local-p13-kill-switch-20260315T000051Z

Freeze PR Template

Gate Run

• Run ID:
• Evidence Path (evidence/run-<id>/):

Gate Verdicts

• ABI (ci-gate-abi):
• Boundary (ci-gate-boundary):
• Tooling Isolation (ci-gate-tooling-isolation):
• Constitutional (ci-gate-constitutional):
• Workspace (ci-gate-workspace):
• Hygiene (ci-gate-hygiene):
• Performance (ci-gate-performance):
• Summary (ci-summarize):

Tooling Isolation Guard

• Perf/preempt tooling touched in this PR: yes/no
• If yes, kernel touch = 0: yes/no
• Tooling isolation evidence path (evidence/run-<id>/gates/tooling-isolation/):

Contract Change

• Changed contracts: yes/no
• If yes, exact paths:

RFC / Waiver

• RFC link (if required):
• Waiver link (if required):

Claim Check

If this PR claims Completed/Production-ready, all must be true:

1. summary.json verdict is PASS
2. test + benchmark evidence linked
3. related docs updated
4. architecture review note linked

Notes

• Planned gates may be hard-fail stubs during freeze hardening.
• Do not merge feature work into mainline during active freeze.