feat: serve flag overrides while uninitialized and mark override evaluations in events#410

kinyoklion wants to merge 2 commits into

rlamb/sdk-2655/override-source-apilaunchdarkly/go-server-sdk:rlamb/sdk-2655/override-source-apifrom

rlamb/sdk-2655/client-override-wiringlaunchdarkly/go-server-sdk:rlamb/sdk-2655/client-override-wiringCopy head branch name to clipboard