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-2026-04-21T03-40-10/prior_lessons.json

@@ -0,0 +1,70 @@
+[
+  {
+    "date": "2026-05-10",
+    "client": "Midway Distribution",
+    "cities": "Chicago",
+    "states": "IL",
+    "events_total": 3,
+    "events_ok": 2,
+    "checkpoint_count": 1,
+    "model": "gpt-oss:20b",
+    "cloud": false,
+    "lesson": "**  \nBefore assigning a Packer to Chicago, verify the candidate’s current assignment and cross‑check drift logs for recent misplacements. Pre‑calibrate packing tools and load a backup Packer into the pool to avoid a single point of failure. If a drift risk is flagged, immediately relocate the Packer or switch to a verified alternate. Keep the pool count updated and ensure it matches the required number of roles before each event.",
+    "checkpoints": [
+      {
+        "after": "09:30",
+        "risk": "Packer drift risk persists",
+        "hint": "Verify Packer's Chicago assignment, review drift logs, recalibrate tools, and consider temporary relocation."
+      }
+    ],
+    "created_at": "2026-04-21T02:14:12.176Z",
+    "file": "2026-05-10_Midway_Distribution_1776737652176.json"
+  },
+  {
+    "date": "2026-05-01",
+    "client": "Northland Logistics",
+    "cities": "Chicago",
+    "states": "IL",
+    "events_total": 2,
+    "events_ok": 2,
+    "checkpoint_count": 1,
+    "model": "gpt-oss:20b",
+    "cloud": false,
+    "lesson": "**  \nBefore assigning the 15:00 baseline_fill, pre‑fetch the list of workers already allocated at 10:00 and cross‑check each candidate’s schedule to avoid double booking. Verify that every worker’s artifact includes a valid `f.reason` before finalizing the assignment. This ensures overlapping shifts are caught early and reduces rework.",
+    "checkpoints": [
+      {
+        "after": "10:00",
+        "risk": "Double booking of scheduled workers",
+        "hint": "Verify each worker's schedule before assigning to 15:00; handle artifact errors by ensuring f.reason exists."
+      }
+    ],
+    "created_at": "2026-04-21T01:57:42.670Z",
+    "file": "2026-05-01_Northland_Logistics_1776736662670.json"
+  },
+  {
+    "date": "2026-04-29",
+    "client": "Midway Distribution — Joliet DC Ramp",
+    "cities": "Joliet",
+    "states": "IL",
+    "events_total": 4,
+    "events_ok": 3,
+    "checkpoint_count": 2,
+    "model": "gpt-oss:120b",
+    "cloud": true,
+    "lesson": "Joliet, IL had zero Picker candidates, causing the 12:30 expansion to abort. For any future Picker demand in the Joliet DC, pre‑pull candidates from Aurora, IL (≈15 mi), which has enough pickers and still qualifies for the $3/hr local bonus. Before assigning Forklift Operator shifts, double‑check that workers aren’t already booked (e.g., Joshua Taylor) and keep a backup pool ID (e.g., 1123) ready for quick pivot. This pre‑emptive sourcing and booking check will keep fills on schedule and within budget.",
+    "checkpoints": [
+      {
+        "after": "12:30",
+        "risk": "Zero local picker supply in Joliet",
+        "hint": "Pivot to Aurora, IL (~15 mi) for Picker candidates; stays within 50 mi radius and retains the $3/hr local bonus."
+      },
+      {
+        "after": "15:00",
+        "risk": "Potential double‑booking of Joshua Taylor",
+        "hint": "For next Forklift Operator shift in Joliet, assign a different qualified worker (e.g., pool ID 1123) or pivot to Chicago, IL (≈30 mi) to stay within bonus radius."
+      }
+    ],
+    "created_at": "2026-04-21T03:35:06.232Z",
+    "file": "2026-04-29_Midway_Distribution_—_Joliet_DC_Ramp_1776742506232.json"
+  }
+]