docs(readme): add --help flag to go run configuration examples

The README says to run 'go run api/cmd/main.go' and 'go run archiver/cmd/main.go' to see configuration options, but running without --help starts the binary instead of printing the options. The correct commands are 'go run api/cmd/main.go --help' and 'go run archiver/cmd/main.go --help'. Verified both commands print the full configuration list with --help.

Open the README and find the configuration-option examples for the API and archiver commands. Update both commands to include --help, then run each command to confirm that it prints the full configuration list instead of starting the binary.

Written by the indexing model from the issue text.