Allow configurable reconnection delay for WiFiConnectionHandler

[ClaudioTZ]

Feature request

I'd like to be able to configure the retry delay for WiFi reconnections in WiFiConnectionHandler.

Currently, the value is hardcoded in CHECK_INTERVAL_TABLE as 500ms:

Arduino_ConnectionHandler/src/ConnectionHandlerDefinitions.h

Lines 191 to 204 in 432961a

	static unsigned int const CHECK_INTERVAL_TABLE[] =
	{
	/* INIT */ 100,
	#if defined(BOARD_HAS_NOTECARD) || defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32)
	/* CONNECTING */ 4000,
	#else
	/* CONNECTING */ 500,
	#endif
	/* CONNECTED */ 10000,
	/* DISCONNECTING */ 100,
	/* DISCONNECTED */ 1000,
	/* CLOSED */ 1000,
	/* ERROR */ 1000
	};

This causes excessive retry attempts and floods the serial output when the WiFi is unavailable.

Proposed solution

It would be great to:

• Allow user override of CHECK_INTERVAL_TABLE, or
• Provide a setter method like setReconnectInterval(NetworkConnectionState state, uint32_t delay_ms).

Context

I'm working on an Arduino IoT Cloud project using Opta and want to increase the reconnection interval to 10 seconds to avoid WiFi flooding.

Thanks for your work!