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lakehouse/auditor 1 blocking issue: todo!() macro call in tests/real-world/scrum_master_pipeline.ts
escalateFailureClusterToLLMTeam now calls a new buildKbPreamble() that mirrors what scrum_master_pipeline does on every per-file review: queries /vectors/pathway/bug_fingerprints + /vectors/search against the lakehouse_arch_v1 corpus, then asks local qwen3.5:latest (provider=ollama) to synthesize a tight briefing. The synthesized preamble prepends the existing escalation prompt so the cloud reviewer sees historical context the same way scrum reviewers do. Reuses existing KB primitives — no new corpora, no new endpoints, no new abstractions. Same code path scrum already exercises 3+ times per review; observer joins the same compounding loop. Audit row gains kb_preamble_chars so we can later track enrichment yield per escalation. Empty preamble (both fingerprints + matrix return nothing) → empty string, prompt unchanged. Verified: qwen3.5:latest synthesis fires for every escalation with non-empty matrix hits (gateway log: 445→72 tokens, 3.1s). Matrix retrieval correctly surfaces PRD Phase 40/44 chunks for chat_completion clusters. Pathway memory stays consistent with scrum (84→87 traces); chat_completion task_class doesn't have fingerprints yet — graceful. Local-model synthesis was J's explicit ask: compress the raw bundle before the cloud call so the briefing is actionable, not a dump. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>