L4 Market Gateway September 2026 Weekly Run & Hardening

[dcplatforms]

Executed the L4 Market Gateway September 2026 weekly run. Hardened site ID parsing and region extraction across multi-key payloads, expanded Zero-Trust JWT secret checks, updated unit security tests, and compiled the weekly report.

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PR created automatically by Jules for task 7231273281487394955 started by @dcplatforms

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Note

Medium Risk
Changes affect production auth rejection rules and DER alarm regional lock routing; mis-parsed regions or site IDs could mis-target Redis grid locks, though scope is limited to Kafka consumers and JWT middleware.

Overview
Hardens L4 Market Gateway Kafka signal handling and production JWT configuration for September 2026 cross-layer parity, plus adds the weekly engineering report.

extractSiteId now guards null payloads, accepts an additional site key, recursively reads nested metadata, and returns null when no site is found (grid-signal logging falls back to SYSTEM_WIDE where needed).

DER_ALARM_REPORTED regional locks use multi-key ISO extraction (iso_region, isoRegion, iso, region) before normalization, so alarm-driven regional grid locks align with varied L2 payload shapes.

Zero-trust JWT: WEAK_SECRETS adds change_in_production and development_secret; production still returns HTTP 500 on weak secrets. security.test.js adds coverage for the new weak-secret values.

WEEKLY_REPORT_SEPTEMBER_2026.md documents completed backlog items L4-141–L4-143 and test verification.

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