fix(orchestrator): make provider-aware Claude key startup requirements

apps/orchestrator/src/config/orchestrator.config.ts

@@ -1,4 +1,17 @@
 import { registerAs } from "@nestjs/config";
+const normalizeAiProvider = (): "ollama" | "claude" | "openai" => {
+  const provider = process.env.AI_PROVIDER?.trim().toLowerCase();
+
+  if (!provider) {
+    return "ollama";
+  }
+
+  if (provider !== "ollama" && provider !== "claude" && provider !== "openai") {
+    return "ollama";
+  }
+
+  return provider;
+};
 
 export const orchestratorConfig = registerAs("orchestrator", () => ({
   host: process.env.HOST ?? process.env.BIND_ADDRESS ?? "127.0.0.1",
@@ -14,6 +27,7 @@ export const orchestratorConfig = registerAs("orchestrator", () => ({
   claude: {
     apiKey: process.env.CLAUDE_API_KEY,
   },
+  aiProvider: normalizeAiProvider(),
   docker: {
     socketPath: process.env.DOCKER_SOCKET ?? "/var/run/docker.sock",
   },