tt-toplike

# Changelog

The **canonical, complete release log lives in [`debian/changelog`](debian/changelog)** —
that's the file the `.deb` packages are built from and where every release is
recorded in full. This file is a friendly pointer plus a summary of the most
recent releases; it deliberately does not duplicate the whole history.

To see everything:

```bash
less debian/changelog          # full history
git tag                        # released versions
```

## Recent releases

### 0.8.0
- **Fix: per-device data was shuffled on multi-card boxes.** The sysfs backend
  numbered devices in raw `readdir` order while `tt-smi` orders by PCI bus id, so
  the default (hybrid) backend's join attributed every card's SMBUS data to the
  wrong card — DDR status, GDDR temps, ECC counters, thermal trips, fan and clocks
  all landed on a neighbour. Discovery is now sorted by bus id, **and the join
  itself keys on the PCI bus id** rather than on list position, so attribution
  also holds when `tt-smi` enumerates fewer cards than hwmon does (a busy card, a
  card that failed to enumerate, `--devices` filtering, hotplug). If you ran the
  default backend on more than one card, what you saw was mixed up.
- **The safe backend got a lot less telemetry-poor.** Alongside hwmon, the sysfs
  path now reads tt-kmd's class-attribute directory
  (`/sys/class/tenstorrent/tenstorrent!N/`): clock frequencies (AICLK/AXICLK/ARCCLK),
  ARC firmware heartbeat, the real board SKU, firmware bundle version, board serial
  and thermal-trip count. `tt_card_type` **replaces** the ~1.2 s `tt-smi -s` startup
  probe on modern drivers. Needs tt-kmd ≥ 2.7; older drivers keep the old behavior.
- **Live PCIe bandwidth.** tt-kmd's `pcie_perf_counters/` are folded into in/out
  directions and differentiated between ~1 Hz samples, so Insights shows a PCIe row
  with link geometry (e.g. `Gen4 x4`) and live ▼/▲ rates. A counter set that can't
  be read at all reports nothing rather than a confident 0 B/s. Sysfs and hybrid
  backends only.
- **Better hwmon reads**: sensors are picked by their `*_label` (so the ASIC temp
  sensor is used, not whichever has the lowest index), the fan sensor is read, and
  each sensor's own `*_max` gives real per-board limits (125 W / 500 A / 90 °C on a
  p300c) instead of hardcoded 300 W / 105 °C — a limit always comes from the same
  sensor as its reading. Limits need tt-kmd ≥ 2.9. The heavier reads (class attrs,
  PCIe counters) are sampled at ~1 Hz instead of on every render frame.
- **New Insights sidebar rows**: Current (with TDC limit), Board power (tt-smi 6.x),
  PCIe, GDDR ECC (only when non-zero — uncorrectable errors in red; they were parsed
  but never shown anywhere before), and thermal trips (only when non-zero).
- **tt-smi upkeep**: full `board_info` parsing (PCIe generation/width, tolerant of
  tt-smi's number-vs-string drift); the Fan row no longer stays blank on cards with a
  spinning fan (live tt-smi emits `FAN_SPEED: "0x0"` next to a real `FAN_RPM`,