Potential fix for code scanning alert no. 5: Clear-text logging of sensitive information

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: marceloceccon

examples/keychain-setup.ts

@@ -33,7 +33,7 @@ async function main(): Promise<void> {
 
   // Retrieve via the priority chain (override → keychain → env → settings)
   const resolved = await resolveApiKey(provider, 'EXAMPLE_API_KEY', {})
-  console.log(`\nresolveApiKey() returned: ${resolved?.slice(0, 16)}...`)
+  console.log(`\nresolveApiKey() found key: ${resolved ? 'yes' : 'no'}`)
 
   // Clean up
   await chain.delete(provider)