Fix struct alignment and regenerate CLI docs

- Align RegistryOAuthConfig struct fields after ClientSecret removal
- Regenerate CLI docs for set-registry-auth command

Co-Authored-By: Claude Opus 4.6 <[email protected]>

Author: ChrisJBurns

docs/cli/thv_config_set-registry-auth.md

@@ -63,11 +63,11 @@ type RegistryAuth struct {
 // RegistryOAuthConfig holds OAuth/OIDC configuration for registry authentication.
 // PKCE (S256) is always enforced per OAuth 2.1 requirements for public clients.
 type RegistryOAuthConfig struct {
-	Issuer   string   `yaml:"issuer"`
-	ClientID string   `yaml:"client_id"`
-	Scopes   []string `yaml:"scopes,omitempty"`
-	Audience     string `yaml:"audience,omitempty"`
-	CallbackPort int    `yaml:"callback_port,omitempty"`
+	Issuer       string   `yaml:"issuer"`
+	ClientID     string   `yaml:"client_id"`
+	Scopes       []string `yaml:"scopes,omitempty"`
+	Audience     string   `yaml:"audience,omitempty"`
+	CallbackPort int      `yaml:"callback_port,omitempty"`
 
 	// Cached token references for session restoration across CLI invocations.
 	CachedRefreshTokenRef string    `yaml:"cached_refresh_token_ref,omitempty"`