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/kirocli.go

@@ -79,7 +79,7 @@ func (p *KiroCliPlugin) Install(config InstallConfig) error {
 	copyKiroObject(nextV2, v2Settings)
 	nextV2["hooks"] = v2Hooks
 
-	nextV3 := cloneKiroObject(v3Settings)
+	nextV3 := cloneJSONObject(v3Settings)
 	nextV3["version"] = "v1"
 	v3Hooks := make([]any, 0, len(currentV3Hooks)+2)
 	for _, hook := range currentV3Hooks {