fix: update tests for SchemaConfigFields and comingSoon logic

- registry.test: fallback now uses SchemaConfigFields, not ProcessConfigFields
- metadata.test: isEnabledAdapterType checks comingSoon first so
  intentionally withheld built-in adapters (process/http) stay disabled

ui/src/adapters/metadata.ts

@@ -26,9 +26,11 @@ export function listKnownAdapterTypes(): string[] {
  * Unknown types (external adapters) are always considered enabled.
  */
 export function isEnabledAdapterType(type: string): boolean {
-  // Known external adapter — always valid
-  if (listUIAdapters().some((a) => a.type === type)) return true;
-  return !getAdapterDisplay(type).comingSoon;
+  // Check display registry first — built-in adapters like process/http are
+  // intentionally withheld even though they're registered as UI adapters.
+  if (getAdapterDisplay(type).comingSoon) return false;
+  // All other types (registered or external) are enabled.
+  return true;
 }
 
 /**
@@ -37,8 +39,8 @@ export function isEnabledAdapterType(type: string): boolean {
  * any non-"coming soon" adapter from the display registry.
  */
 export function isValidAdapterType(type: string): boolean {
-  if (listUIAdapters().some((a) => a.type === type)) return true;
-  return !getAdapterDisplay(type).comingSoon;
+  if (getAdapterDisplay(type).comingSoon) return false;
+  return true;
 }
 
 /**