add virtual api key validation in verifySession

src/lib/aiCapabilities.ts

@@ -0,0 +1,12 @@
+export const AI_CAPABILITIES = [
+    "openai_chat",
+    "openai_responses",
+    "anthropic_messages",
+    "gemini_generate_content",
+    "bedrock_model_invoke",
+    "google_generate_content",
+    "google_raw_predict",
+    "bedrock_converse"
+] as const;
+
+export type AiCapability = (typeof AI_CAPABILITIES)[number];