docs: flip stale status markers across the tracks (audit found 23)

An all-tracks docs-vs-code audit (the same method that caught the storage
drift) found 23 confirmed inaccuracies where a doc's build-status claim no
longer matches the source — status markers that were never flipped after a
track landed, and a few paths left over from completed flag-days. All verified
against the code before editing; docs only, no behavior change.

The systemic ones:
- IOMMU enforcement (driver-model.md, drivers.md): docs said enforcement was
  not built and "device_claim = ring 0" / "memory-safe is not true yet". It is
  built (per-device VT-d/AMD-Vi domains programmed at device_claim, -ECONFINE
  rollback, dma_alloc buffers bound and torn down at death; fail-open only with
  no IOMMU). Restated; M16 marker flipped to done.
- The FHS flag-day paths: /etc/devices.csv -> /system/configuration/devices.csv
  (devices-csv.md, new-driver-checklist.md, device-manager.md), /var/log ->
  /system/logs (logging.md, new-driver-checklist.md), /mnt/usb -> /volumes/usb
  (process-management.md). Following the old paths silently breaks driver match.
- protocol-namespace P4 "remaining" -> landed (only P5 remains); shared-fate
  fan-out "not yet enforced" -> enforced; wall_clock "not built" -> built;
  SMP affinity + fault-recovery "left" -> built; process_enumerate raw-pointer
  trust model -> checked copyToUser/EFAULT; bounds.md maximum_devices static
  hole -> dynamic per-registrar quota; init spawns fat -> volume-manager;
  config "hardcoded, move to /etc" -> already CSV data files; vdso.md three-
  value call; zig-self-hosting library/ layout; python argv "new" -> built.

Found and fixed by a multi-agent audit across 12 doc clusters, each finding
adversarially verified against the source.

docs/device-driver-development/new-driver-checklist.md

@@ -162,7 +162,7 @@ Without the boot-tree row the binary never reaches the image and the
 device-manager has nothing to spawn. (The package also builds standalone:
 `cd system/drivers/intel-uhd-graphics-750 && zig build`.)
 
-## 3. Add the match rule to `etc/devices.csv`
+## 3. Add the match rule to `system/configuration/devices.csv`
 
 One row: bus, class triplet, vendor/device, driver path. **Copy the class
 triplet from the pci-bus boot log line, not from another row** — for the iGPU
@@ -195,9 +195,9 @@ mapping — with zero risk to the hardware.
 ## 5. Verify the plumbing
 
 - `zig build test` still passes.
-- On the image: `/var/log/<boot-stamp>/system/services/device-manager.log`
+- On the image: `/system/logs/<boot-stamp>/system/services/device-manager.log`
   shows `spawned <name> for device <N>`, and
-  `/var/log/<boot-stamp>/system/drivers/<name>.log` holds the resource list and
+  `/system/logs/<boot-stamp>/system/drivers/<name>.log` holds the resource list and
   your first read.
 - If the driver did not spawn, diagnose in this order: binary on the image
   (step 2) → CSV row matches the log line exactly (step 3) → path identical in