fix(02-grid-signal): resolve merge conflict artifacts in L2 weekly report

[dcplatforms]

Cleaned up git merge conflict markers in services/02-grid-signal/L2_WEEKLY_REPORT_V256.md to ensure clean Markdown report format and 100% test suite compliance.

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PR created automatically by Jules for task 11856076620551672880 started by @dcplatforms

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Note

Low Risk
Documentation-only cleanup with no application, config, or security logic changes.

Overview
Removes leftover git merge conflict markers from L2_WEEKLY_REPORT_V256.md so the v2.5.6 weekly report renders as normal Markdown again.

The resolved Cross-Layer Delta keeps the fuller main narrative (L3/L8 additions, expanded OpenADR and safety sections) instead of the shorter HEAD variant, including wording that L1 alignment uses zero-trust JWT secret rejection in production. Action Items are updated to match that merged content (security hardening, alarm TTL, test compliance, doc sync)—no runtime or test code changes in this diff.

^{Reviewed by Cursor Bugbot for commit ebfde70. Configure here.}

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