When a GitHub access-source connector has no organization configured
yet (user finished OAuth but abandoned the picker), the source-name
worker called https://api.github.com/orgs/ and got a 404 every 10
seconds, flooding logs. All other picker resolvers (sentry, gitlab,
bitbucket, heroku, asana, netlify, clickup, vercel) short-circuit to
("", nil) for empty settings -- this aligns github with them so the
worker falls into its existing "empty instance name -> mark synced
with generic name" branch instead of retrying forever.
Signed-off-by: Aurélien Sibiril <81782+aureliensibiril@users.noreply.github.com>
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