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Observability-spine framing: Bosch telemetry/observability PoC promoted to lead, Swisscom Iceberg lakehouse + on-call/RCA. Real Ashby JD (verbatim). Tier 1+2 critique fixes applied; Vizrt low-latency skipped per user. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>