fix: Drop unnecessary createTracker non-null assertions

LDAIConfig.createTracker is declared non-optional in src/api/config/types.ts,
so the `!` is unnecessary across the three getting-started examples.

Refs AIC-2383

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: jsonbailey

packages/sdk/server-ai/examples/getting-started/bedrock/converse/src/index.ts

@@ -80,7 +80,7 @@ async function main() {
       return;
     }
 
-    const tracker = aiConfig.createTracker!();
+    const tracker = aiConfig.createTracker();
 
     const chatMessages = mapPromptToConversation(aiConfig.messages ?? []);
     const systemMessages =

packages/sdk/server-ai/examples/getting-started/openai/chat-completions/src/index.ts

@@ -70,7 +70,7 @@ async function main() {
       return;
     }
 
-    const tracker = aiConfig.createTracker!();
+    const tracker = aiConfig.createTracker();
 
     const sampleQuestion = 'What can you help me with?';
     const messages = [

packages/sdk/server-ai/examples/getting-started/vercel-ai/generate-text/src/index.ts

@@ -69,7 +69,7 @@ async function main() {
       return;
     }
 
-    const tracker = aiConfig.createTracker!();
+    const tracker = aiConfig.createTracker();
     const model = openai(aiConfig.model?.name ?? 'gpt-4');
     const parameters = VercelRunnerFactory.mapParameters(aiConfig.model?.parameters);