Version 0.7.0

Added

• NTP Time Synchronization (Ntp): Added the Ntp module to synchronize system time via SNTP after WiFi connection, providing isSynced(), configurable time servers, and timezone string options (og3/ntp.h).
• Offline UDP Log Buffering: UdpLogger now uses a fixed-capacity ring queue to buffer log entries with timestamps while WiFi is offline, automatically flushing queued logs in batched datagrams upon reconnection.
• Adafruit IO & SSL/TLS MQTT Support: Enhanced MqttManager with support for Adafruit IO (Mode::kAdafruitIO) alongside Home Assistant, configurable SSL/TLS options, and Adafruit root CA bundle verification on ESP32.
• Pointer-Based Dependency Linking: Added Module::add_dependency(Module*) to declare dependencies directly on module pointers.

Changed

• WifiManager State Machine & Exponential Backoff: Restructured WifiManager into a formal state machine (kIdle, kConnectingSta, kConnectedSta, kWaitingReconnectSta, kSoftAp) with exponential backoff retries, automatic Soft AP failover, and periodic reconnect attempts.
• Module & Variable Identity: Updated Module constructors and VariableBase metadata to use std::string internally to ensure safe lifecycle and memory management.
• Deleted Copy Constructors: Explicitly deleted copy constructors and assignment operators for Module, VariableBase, VariableGroup, App, and related classes to prevent accidental slicing or lifecycle duplication.
• Sonar Pulse Timeout: Added a configurable pulse timeout to Sonar::ping() to prevent blocking if an echo pulse is missed.
• Scoped MQTT Status Publishing: Restricted periodic AppStatus and WifiMonitor MQTT status reporting to Home Assistant mode, avoiding feed spamming in Adafruit IO mode.