chore: add real content that was sitting untracked

Surfaced by today's untracked-files audit. None of these are accidents —
multiple are referenced by name in CLAUDE.md and memory files but were
never added.

Categories:
- docs/PHASE_AUDIT_GUIDE.md (106 LOC) — Claude Code phase audit guidance
- ops/systemd/lakehouse-langfuse-bridge.service — Langfuse bridge unit
- package.json — top-level npm manifest
- scripts/e2e_pipeline_check.sh + production_smoke.sh — real test scripts
- reports/kimi/audit-last-week*.md — the "Two reports live" CLAUDE.md cites
- tests/multi-agent/scenarios/ — 44 staffing scenarios (cutover decision A)
- tests/multi-agent/playbooks/ — 102 playbook records
- tests/battery/, tests/agent_test/PRD.md, tests/real-world/* — real tests
- sidecar/sidecar/{lab_ui,pipeline_lab}.py — 888 LOC dev-only UIs that
  remain in service post-sidecar-drop (commit ba928b1 explicitly kept them)

Sensitivity check: scenarios use synthetic company names ("Heritage Foods",
"Cornerstone Fabrication"); audit reports describe code findings only;
no PII or secrets surfaced.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/multi-agent/playbooks/scenario-2026-04-21T01-22-35/emails.md

@@ -0,0 +1,69 @@
+# Client emails — Riverfront Steel, 2026-04-21
+
+## 08:00 baseline_fill — Warehouse Associate x3
+
+Subject: 3 Filled
+
+Dear Riverfront Steel Team,
+
+We are pleased to confirm that we have filled all three positions with Warehouse Associates as follows:
+
+- Patrick Ross
+- Olivia Y. Howard 
+- Deborah X. Sanchez
+
+All workers will start their regular Monday morning shift at 08:00 AM, lasting 8 hours.
+
+Best regards,
+Dispatch Team Lakehouse
+
+## 10:30 recurring — Machine Operator x2
+
+To: staffing@riverfrontsteel.example  
+From: dispatch@lakehouse.example  
+Subject: Confirmed
+
+Dear Riverfront Steel Team,
+
+We are pleased to confirm that we have filled both Machine Operator roles for your upcoming shift starting at 11:00 AM on Tuesday and Thursday.
+
+- Kimberly G. Thomas
+- Kathleen O. Ortiz
+
+These workers were selected based on their top-ranked hybrid search results (Kimberly with a score of 0.59, Kathleen with 0.57) for Machine Operator positions. 
+
+Please note that this is a recurring slot; prior workers may still be available.
+
+Best regards,
+
+Lakehouse Dispatch Team
+
+## 12:15 expansion — Forklift Operator x5
+
+Subject: 5 Forklift Operators Confirmed
+
+Dear Riverfront Steel Team,
+
+I am pleased to confirm that we have filled all five positions for your forklift operators at the new warehouse location opening today. The workers are as follows:
+
+- Matthew P. Garcia
+- Maria K. Cruz 
+- Nancy W. Ward
+- Charles T. Walker
+- Rachel Turner
+
+Shifts start at 1:00 PM.
+
+Best regards,
+Dispatch Team, Lakehouse Example
+
+## 15:45 misplacement — Warehouse Associate x1
+
+To: staffing@riverfrontsteel.example  
+From: dispatch@lakehouse.example  
+Subject: Fill Confirmed
+
+We have filled 1 position for the remainder of the 08:00 shift as requested. Ryan Hughes will be a Warehouse Associate. Please note that one worker from this fill did not show up; we are currently rebuilding the gap. Thank you.
+
+Best regards,  
+Lakehouse Dispatch