feat(m15): nvidia-smi snapshot + display logs + inventory in reports — 0.32.0

Expand diagnostic/report collection (all stored per-diagnostic, in the Report zip;
logs also fed to the AI on "Explain"):
- syslogs: nvidia-smi -q snapshot (driver/throttle/clocks/power/temps/PCIe/ECC/
  retired pages) + display-server log auto-detected — Xorg.0.log on X11, or the
  compositor user-journal slice (gnome-shell/kwin/sway/gamescope) on Wayland.
- diagstore: include the full M5 inventory (inventory.txt + .json) — invaluable
  for larger/shared debugging. inventory.collect() degrades gracefully (no root
  prompt). Best-effort throughout.
- Tests for nvidia/display + inventory in store; docs (M15/SPEC).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -5,6 +5,18 @@ All notable changes to RigDoctor are recorded here. Format follows
 (`MAJOR.MINOR.PATCH`, pre-1.0). `__version__` and `pyproject.toml` must match the git
 release tag (so the auto-updater, D18, can compare versions).
 
+## [0.32.0] - 2026-05-22
+### Added
+- **More for diagnostics & reports:**
+  - **`nvidia-smi -q` snapshot** — driver, throttle/clock-event reasons, clocks, power, temps,
+    PCIe link, ECC + retired pages (point-in-time at diagnostic time).
+  - **Display-server log** — auto-detected: `Xorg.0.log` on X11, or the compositor's user-journal
+    slice (gnome-shell/kwin/sway/gamescope) on Wayland.
+  - **Full system inventory** (M5 hardware/OS) is now included in each stored diagnostic and the
+    **Report** bundle — invaluable for larger/shared debugging.
+  These join the kernel log + coredump records in `syslogs.txt`/`inventory.*`, are saved per
+  diagnostic, included in the Report zip, and (logs) fed to the AI on "Explain".
+
 ## [0.31.0] - 2026-05-22
 ### Added
 - **Diagnostics now collect session-scoped system logs** (`core/syslogs.py`): a kernel-log