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/scenarios/scen_016_Parallel_Machining_Grand_Rapids.json

@@ -0,0 +1,40 @@
+{
+  "client": "Parallel Machining",
+  "date": "2026-05-09",
+  "events": [
+    {
+      "kind": "baseline_fill",
+      "at": "16:30",
+      "role": "Loader",
+      "count": 2,
+      "city": "Grand Rapids",
+      "state": "MI",
+      "shift_start": "16:30 AM"
+    },
+    {
+      "kind": "recurring",
+      "at": "09:00",
+      "role": "Receiving Clerk",
+      "count": 2,
+      "city": "Grand Rapids",
+      "state": "MI",
+      "shift_start": "09:00 AM"
+    },
+    {
+      "kind": "emergency",
+      "at": "10:00",
+      "role": "CNC Operator",
+      "count": 3,
+      "city": "Grand Rapids",
+      "state": "MI",
+      "shift_start": "10:00 AM"
+    }
+  ],
+  "contract": {
+    "deadline": "2026-06-14",
+    "budget_per_hour_max": 34,
+    "local_bonus_per_hour": 2,
+    "local_bonus_radius_mi": 114,
+    "fill_requirement": "paramount"
+  }
+}