docs(runbook): add B8 static IP baseline (WinBuild2022, 4 iterations)

Static IP via ip_pool: 24 s boot-to-ready vs 102 s DHCP (4x faster),
IP acquire now deterministic (σ < 0.03 s vs σ ≈ 57 s with DHCP).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docs/RUNBOOK.md

@@ -415,3 +415,43 @@ Windows (σ ≈ 26 s). This is VMware Tools DHCP/guestinfo reporting latency,
 not a regression in orchestrator logic. With 4 samples the avg is not stable;
 additional runs may close the gap. No non-IP phase regressed.
 
+---
+
+## 8. Static IP baseline — WinBuild2022 with ip_pool (B8 result)
+
+Recorded 2026-05-25 — `Measure-CIBenchmark.ps1 -StaticIP 192.168.79.200 -Iterations 4`,
+Linux Mint host, template `WinBuild2022` / snapshot `BaseClean`.
+`guestinfo.ip-assignment` injected into cloned VMX before start;
+`ci-static-ip.ps1` scheduled task applies IP at boot and writes back
+`guestinfo.ci-ip`. IP column = time until `guestinfo.ci-ip` readable via
+`vmrun readVariable` (`-GuestInfoOnly` mode — DHCP fallback disabled).
+Ready column = WinRM/5986 TCP probe after IP known.
+
+| Iter    | Clone (s) | Start (s) | IP acquire (s) | Ready (s) | Destroy (s) | Boot total (s) |
+| ------- | --------- | --------- | -------------- | --------- | ----------- | -------------- |
+| 1       | 0.41      | 1.86      | 21.80          | 0.00      | 9.75        | 24.07          |
+| 2       | 0.40      | 1.88      | 21.74          | 0.00      | 9.81        | 24.02          |
+| 3       | 0.40      | 1.90      | 21.75          | 0.00      | 12.26       | 24.05          |
+| 4       | 0.40      | 1.89      | 21.77          | 0.00      | 9.77        | 24.06          |
+| **avg** | **0.40**  | **1.88**  | **21.77**      | **0.00**  | **10.40**   | **24.05**      |
+
+**Comparison vs B7 DHCP baseline (WinBuild2025, same host):**
+
+| Metric      | B7 DHCP avg | B8 static avg | Delta         |
+| ----------- | ----------- | ------------- | ------------- |
+| IP acquire  | 99.7 s      | 21.8 s        | **−78 s (−78%)** |
+| Boot total  | 102.3 s     | 24.1 s        | **−78 s (−76%)** |
+| Clone       | 0.44 s      | 0.40 s        | ≈ same        |
+| Start       | 2.12 s      | 1.88 s        | ≈ same        |
+| Ready       | 0.01 s      | 0.00 s        | ≈ same        |
+
+**Key findings**:
+- Static IP reduces boot-to-ready from ~102 s to ~24 s — **4× faster**.
+- IP acquire is now deterministic: σ < 0.03 s (vs σ ≈ 57 s with DHCP).
+- Ready = 0 s: WinRM is already listening on the static IP by the time
+  `guestinfo.ci-ip` is written — no additional TCP probe wait.
+- `ci-static-ip.ps1` startup latency (~21.8 s) is the new floor; it reflects
+  Windows boot + Task Scheduler + NIC reconfiguration time.
+- Destroy is slower on WinBuild2022 (~10 s vs ~5 s on WinBuild2025) —
+  unrelated to static IP; likely VMDK or snapshot difference.
+