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-2026-04-21T01-42-24/results.json

@@ -0,0 +1,56 @@
+[
+  {
+    "event": {
+      "kind": "baseline_fill",
+      "at": "10:00",
+      "role": "Machine Operator",
+      "count": 2,
+      "city": "Joliet",
+      "state": "IL",
+      "shift_start": "10:00 AM"
+    },
+    "ok": true,
+    "fills": [
+      {
+        "candidate_id": "4383",
+        "name": "Priya Parker"
+      },
+      {
+        "candidate_id": "36405",
+        "name": "Omar F. Wright"
+      }
+    ],
+    "turns": 3,
+    "duration_secs": 22.868,
+    "gap_signals": [
+      "double_book: undefined Omar F. Wright already booked for 10:00",
+      "artifact: undefined is not an object (evaluating 'f.reason.slice')"
+    ],
+    "sources_first_score": 0.7822654,
+    "sources_last_score": 0.6476389,
+    "pool_size": 987,
+    "playbook_citations": [
+      "pb-seed-eb440d78f6598941"
+    ],
+    "discovered_pattern": "Across 25 similar past playbooks (17 workers examined) · recurring certifications: OSHA-10 (53%) · recurring skills: 6S (41%) · archetype mostly: communicator · reliability median 0.83 (range 0.59–1.00)"
+  },
+  {
+    "event": {
+      "kind": "recurring",
+      "at": "09:30",
+      "role": "Packer",
+      "count": 2,
+      "city": "Joliet",
+      "state": "IL",
+      "shift_start": "09:30 AM"
+    },
+    "ok": false,
+    "fills": [],
+    "turns": 0,
+    "duration_secs": 19.928,
+    "error": "aborted — 3 consecutive drift flags",
+    "gap_signals": [
+      "drift_or_tool: aborted — 3 consecutive drift flags"
+    ]
+  }
+]