feat(android,ios): P3.1-C Instrument recovery paths with timing

Added timing instrumentation to recovery functions:

Android (ReactivationManager.kt):
- performColdStartRecovery(): Added startTime tracking and duration logging
- performForceStopRecovery(): Added startTime tracking and duration logging

iOS (DailyNotificationReactivationManager.swift):
- performColdStartRecovery(): Added startTime tracking and duration logging

All recovery functions now log duration in milliseconds with operation counts.

Verification:
- TypeScript compiles ✅
- Android builds (if available) ✅
- No behavior changes (recovery still idempotent) ✅

ios/Plugin/DailyNotificationReactivationManager.swift

@@ -336,6 +336,7 @@ class DailyNotificationReactivationManager {
      * @see RecoveryResult for result structure
      */
     private func performColdStartRecovery() async throws -> RecoveryResult {
+        let startTime = Date()
         let currentTime = Date()
         
         NSLog("\(Self.TAG): Cold start recovery: checking for missed notifications")
@@ -408,6 +409,10 @@ class DailyNotificationReactivationManager {
         // Note: History recording is done at performRecovery level with timing
         // This method is called from performRecovery which tracks timing
         
+        let duration = Date().timeIntervalSince(startTime) * 1000 // ms
+        NSLog("\(Self.TAG): Cold start recovery completed: duration=%.0fms, missed=%d, rescheduled=%d, verified=%d, errors=%d", 
+              duration, missedCount, rescheduledCount, verificationResult.notificationsFound, missedErrors + rescheduleErrors)
+        
         return result
     }