Convert the 10 commands that were still using Run with
ErrorOutput/SuccessOutput or log.Fatal/os.Exit:
- backfillNodeIPsCmd: use grpcRunE-style manual connection with
error returns; simplify the confirm/force logic
- getPolicy, setPolicy, checkPolicy: replace ErrorOutput with
fmt.Errorf returns in both the bypass-gRPC and gRPC paths
- serveCmd, configTestCmd: replace log.Fatal with error returns
- mockOidcCmd: replace log.Error+os.Exit with error return
- versionCmd, generatePrivateKeyCmd: replace SuccessOutput with
printOutput
- dumpConfigCmd: return the error instead of swallowing it
Go style recommends that log messages and error strings should not be
capitalized (unless beginning with proper nouns or acronyms) and should
not end with punctuation.
This change normalizes all zerolog .Msg() and .Msgf() calls to start
with lowercase letters, following Go conventions and making logs more
consistent across the codebase.
