NTP library does not follow policy

[Xrnah]

Policy:

• Use a non-blocking approach (e.g., sends a request and checks for a reply later without waiting).
• Has short, well-defined timeout on network calls.

Issue
NTP.cpp

while (now < 8 * 3600 * 2) {
  delay(500);
  ...
}

• Blocks indefinitely if NTP fails (violates policy).
• delay(500) blocks the main loop.
• No timeout → can hang forever.

This currently works as a blocking function to sync time before MQTT kicks in

To do:

• use SNTP API as real-time guarantee