fix(env): convert CI to boolean and fix type comparison

- Convert ENV.CI to boolean using envAsBoolean (consistent with VITEST)
- Fix cli-entry.mts to use boolean comparison instead of string comparison
- Fixes TypeScript error: "This comparison appears to be unintentional because the types 'boolean' and 'string' have no overlap"
- Both ENV.VITEST and ENV.CI are now properly typed as booleans

Author: jdalton

packages/cli/src/cli-entry.mts

@@ -53,7 +53,7 @@ void (async () => {
   const registryUrl = lookupRegistryUrl()
 
   // Skip update checks in test environments.
-  if (ENV.VITEST !== '1' && ENV.CI !== 'true') {
+  if (!ENV.VITEST && !ENV.CI) {
     // Unified update notifier handles both SEA and npm automatically.
     await scheduleUpdateCheck({
       authInfo: lookupRegistryAuthToken(registryUrl, { recursive: true }),

packages/cli/src/env/ci.mts

@@ -5,4 +5,6 @@
 
 import { env } from 'node:process'
 
-export const CI = env['CI']
+import { envAsBoolean } from '@socketsecurity/lib/env'
+
+export const CI = envAsBoolean(env['CI'])