v0.0.9

Firmware
- QMI PSRAM quad-mode (QPI) driver — 4-6x bandwidth over the previous
  1-bit serial access; CS1 timing retimed on clock change, which was the
  root cause of native-app crashes at 300MHz
- OTA flash write fixed and verified on hardware across versions
- Native app loader: PSP stack trampoline, XIP cache-clean handling,
  split SRAM/PSRAM loading
- MP3 decode-burst staging fix (mid-burst refill, 8KB staging, pre-roll)
- HardFault handler: SFSR/IPSR capture, per-core stack bounds

Apps
- GBC: ROM picker, save states, direct ROM/cart-RAM fast paths
- Doom: audio enabled (FEATURE_SOUND)
- C-Dogs: boot-to-menu fixes, graphics accounting

Tooling / CI
- Simulator: headless software-renderer fallback, per-process crash log,
  stdout/stderr drained by the test harness
- CI restored end to end: submodule gitlinks made reachable, dependency
  drift fixed, E2E suite green for the first time