Execute is the entry point to the controller manager.

Run sets up a default stderr logger and starts the controller manager.

RunWithLogger starts the controller manager with a provided logger.

SetupSignalHandler registers for SIGTERM and SIGINT.

StartDiagnosticsServer starts a goroutine that handles requests for the diagnostics server.

DiagnosticConfigBufferDepth is the size of the channel buffer for receiving diagnostic config dumps from the proxy sync loop.