docs: Add comprehensive CHANGELOG entries for v1.4 and v1.5#41

BruinGrowly merged 1 commit intomainBruinGrowly/Python-Code-Harmonizer:mainfrom

claude/continue-session-011cup4stf9y4bt5uohvs657-011CUp7WtJ672DcZTBUqG9EBBruinGrowly/Python-Code-Harmonizer:claude/continue-session-011cup4stf9y4bt5uohvs657-011CUp7WtJ672DcZTBUqG9EBCopy head branch name to clipboard