ALL-1995: dashboard monitor update parameterizationOverrides fix

ALL-1995 — PR #12757 open, READY (not draft), assigned to sephcoster, review-requested. Branch wintermute/all-fix-monitor-update-overrides. HEAD 90bcf122. Fix passes parameterizationOverrides through buildUpdateInput. All CI gates green on first push (15/15): Build, Lint, Type Check, Unit Tests, DeepSource JS, DeepSource Test Coverage, Bugbot, Vercel previews. CodeRabbit: skipped-bot (auto-bot rule). Mergeable. REVIEW_REQUIRED — awaiting Seph review/merge.