chore(oss): audit the server package and resync the SDK mirrors

Split the 657-line operation service into eor, submit, and verify
modules, add the AGENT_REVOKED and KEY_RETIRED codes the Backend already
emits, and condense every multi-line comment. Mirror Node, Python, and
Go at 2.1.0 with the deep-health 503, non-idempotent retry, rotation
grace, and path-encoding fixes. Document which routes and response
fields the self-hosted server does not provide.

Claude-Session: https://claude.ai/code/session_01Agoc9bRVE9KL7mmWtey9Vq

sdks/go/cmd/elydora/plugins/grok.go

@@ -36,11 +36,11 @@ func (p *GrokPlugin) Install(config InstallConfig) error {
 	if err != nil {
 		return err
 	}
-	guardCommand, err := buildGrokCommand(nodePath, paths.guardPath)
+	guardCommand, err := buildEncodedCommand("Grok", nodePath, paths.guardPath)
 	if err != nil {
 		return err
 	}
-	auditCommand, err := buildGrokCommand(nodePath, paths.auditPath)
+	auditCommand, err := buildEncodedCommand("Grok", nodePath, paths.auditPath)
 	if err != nil {
 		return err
 	}