Make Util.log autoclosure-based and add setUp lifecycle logs

Util.log:
- Switch the message parameter to @autoclosure so the interpolated string
  is only built when DEBUG is set. Eliminates allocation/format cost in
  release builds where the print() is compiled out.
- Bracket the prefix as "[UnityAdapter] ..." for consistency with other
  third-party adapter logs (AppLovin, AdMob, etc.).

UnityAdapter.setUp:
- Log when initialization starts (gameId, testMode), when it succeeds,
  when the SDK reports a failure, and when setUp aborts before reaching
  the SDK (e.g. missing gameId in server config). Gives integrators
  enough breadcrumbs from the adapter alone to diagnose init issues
  without having to attach to the SDK's internal logger.

Note: For the logs to surface in pod consumers, the host app's Podfile
must propagate SWIFT_ACTIVE_COMPILATION_CONDITIONS=DEBUG into pod
targets — CocoaPods does not do this by default.

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

Author: vishaldhiman-unity

adapters/Unity/UnityAdapter/UnityAdapter.swift

@@ -45,10 +45,17 @@ final class UnityAdapter: NSObject, RTBAdapter {
         .with(logLevel: isTestMode ? .debug : .info)
         .build()
 
+      Util.log("setUp: initializing UnityAds (gameId=\(gameId), testMode=\(isTestMode))")
       client.initialize(configuration: initConfig) { error in
-          completionHandler(error)
+        if let error {
+          Util.log("setUp: UnityAds init failed — \(error.localizedDescription)")
+        } else {
+          Util.log("setUp: UnityAds init succeeded")
+        }
+        completionHandler(error)
       }
     } catch {
+      Util.log("setUp: aborted before SDK init — \(error.localizedDescription)")
       completionHandler(error)
     }
   }

adapters/Unity/UnityAdapter/Util.swift

@@ -22,9 +22,9 @@ final class Util {
     case placementId = "zoneId"
   }
 
-  static func log(_ message: String) {
+  static func log(_ message: @autoclosure () -> String) {
     #if DEBUG
-      print("UnityAdapter: \(message)")
+      print("[UnityAdapter] \(message())")
     #endif
   }