v0.3.1 - V4 panic handler integration

Added

• V4 panic handler integration for ESP32-C6 runtime
  • Comprehensive panic information logging via ESP_LOGE
  • Displays error code, task ID, instruction pointer, stack state
  • Shows top 4 data stack values for debugging
  • Visual error indication via rapid LED blinking
  • System halt on fatal errors for safe debugging

Changed

• Updated to V4-engine v0.13.0 for improved panic handler API
  • Use V4PanicInfo struct with correct field names
  • Use PRId32 format specifier for portable int32_t formatting
• Fixed Docker compose V4-engine mount path (V4 → V4-engine)

Fixed

• Fixed compilation errors in panic handler implementation
  • Added missing LED control functions
  • Added <cinttypes> include for PRId32
  • Corrected PanicInfo field access

Full Changelog: v0.2.0...v0.3.1