Convert PSRAM to MB in usage reporting (#5130)

* Initial plan

* Convert PSRAM from bytes to MB in usage reporting JavaScript

Co-authored-by: netmindz <442066+netmindz@users.noreply.github.com>

* Use 1024*1024 instead of magic number for bytes to MB conversion

Co-authored-by: netmindz <442066+netmindz@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: netmindz <442066+netmindz@users.noreply.github.com>

wled00/data/index.js

@@ -3443,7 +3443,7 @@ function reportUpgradeEvent(info, oldVersion) {
 			};
 
 			// Add optional fields if available
-			if (infoData.psram !== undefined) upgradeData.psramSize = infoData.psram;
+			if (infoData.psram !== undefined) upgradeData.psramSize = Math.round(infoData.psram / (1024 * 1024));  // convert bytes to MB
 			// Note: partitionSizes not currently available in /json/info endpoint
 
 			// Make AJAX call to postUpgradeEvent API