v1.0.3: Performance optimizations + flash.py improvements

Changes

Performance Optimizations (boundary mode)

• PSRAM: TLSF allocator pool moved to 2MB PSRAM (was internal SRAM)
• TCP clients: Max increased from 4 to 8
• Path table: Expanded from 48→128 entries, persist 16→32
• Logging: NDEBUG strips TRACE/DEBUG macros; runtime level LOG_VERBOSE
• Serial baud: 921600 for boundary mode (was 115200)

flash.py Improvements

• Default to app-only flash (preserves device settings)
• Added --full flag for merged binary flash (overwrites everything)
• --erase now implies --full (device needs bootloader after erase)

Build Stats

• RAM: 21.7% | Flash: 16.9%

Artifacts

• rnode_firmware_heltec32v4_boundary.bin — App-only binary (flash at 0x10000, preserves settings)
• rnodethv4_firmware.bin — Merged binary (flash at 0x0000, full flash)