Release 0.9.4 dev.8

Release: 0.9.4
Build: 0.9.4-dev.8
Status: development / Waveshare PSRAM telemetry correction

Build 0.9.4-dev.8 is a narrow diagnostics correction after the first real-hardware dev.7 Carousel/GIF PSRAM-staging run.

The dev.7 staging implementation remains unchanged. The correction only ensures that each /json/info PSRAM snapshot is internally consistent by folding the exact current samples into the low-water marks before calculating peakUsed.

minFree <= free
minLargest <= largest
peakUsed = total - minFree

The existing Waveshare staging policy remains: GIF files up to 2 MiB may be staged in PSRAM while preserving a 4 MiB free-PSRAM reserve, with automatic fallback to LittleFS if a staging guard fails.