FlowLogger exception message handling

Thanks to @jamessimone for working on this fix, and thanks to @shuylern and @andrewofornikar for reporting the issue & sharing their workarounds!

Core Unlocked Package Changes

• Fixed #827: FlowLogger now properly truncates the LogEntryEvent__e.ExceptionMessage__c field. Previously, long values would have caused an exception & prevented the corresponding LogEntryEvent__e from being properly published.

Installation Info

Core Unlocked Package - no namespace

• SF CLI: sf package install --wait 20 --security-type AdminsOnly --package 04t5Y0000015oklQAA
• Sandbox: https://test.salesforce.com/packaging/installPackage.apexp?p0=04t5Y0000015oklQAA
• Production: https://login.salesforce.com/packaging/installPackage.apexp?p0=04t5Y0000015oklQAA