Remove duplicate model_name check in ValidateModelList to support
load balancing feature where multiple configs can share the same
model_name for round-robin selection.
Update tests to reflect the new behavior.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add validation to ensure model_name is unique across all entries in
model_list. This prevents potential conflicts when multiple model
configs share the same model_name identifier.
Refactor command handlers into separate files to improve code organization
and maintainability. Each command (agent, auth, cron, gateway, migrate,
onboard, skills, status) now has its own dedicated file.
Restructure provider creation to support new model_list configuration
system that enables zero-code addition of OpenAI-compatible providers.
Move legacy provider logic to separate file for backward compatibility.
Move configuration functions from config.go to separate files
(defaults.go, migration.go) for better organization.