HyperCore v6.9.0 — Foundation Hardening & MT6789 Consistency Release

What's Changed

Charger dedup: collapsed 10 copy-paste save/load_*_conf pairs into save_int_conf/load_int_conf + thin wrappers (src/charger.c, -142 LOC).
Baseline table-drive: stock_state.conf save/load now loops over descriptor tables (src/sysfs.c).
Thermal normalization: single normalize_thermal_temps() inline replaces 8 duplicated mili-degree blocks in main/ipc/charger.
Chmod guard dedup: unified write_chmod_guarded() for rate-limit vs sconfig chmod variants (src/cpu.c).
Atomic baseline: save_stock_baseline() writes tmp+rename so power loss never leaves half-written stock_state.conf.
IPC resilience: status JSON buffer 1024->1152 with bounds check, ipc_sync_status() helper, sigaction() for SIGTERM/SIGINT.
WebUI guards: shell.js double-resolve fix (settled flag), removed dead pollCpuGpu/pollRamBat, hypermoon.js _pollInFlight guard.
MT6789 lock: customize.sh now requires GED+Mali+FPSGO (was ||), strict parity with daemon validate_hardware_target().
HyperMoon fix: overlay cpu_policy now shows hardware ceiling cpuinfo_max_freq (500-2200 MHz) instead of throttled scaling_max_freq (500-2000).

service.sh graceful SIGTERM before SIGKILL so restore_baseline_nodes() runs; uninstall.sh restores full GED/FPSGO/VM set.
Version fallbacks in WebUI no longer hard-code v6.8.5 (store.moduleVersion is live truth).

Full Changelog: https://github.com/itswill00/hypercore/blob/main/changelog.md