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) ✅

android/src/main/java/com/timesafari/dailynotification/ReactivationManager.kt

@@ -529,6 +529,7 @@ class ReactivationManager(private val context: Context) {
      * @return RecoveryResult with counts
      */
     private suspend fun performColdStartRecovery(): RecoveryResult {
+        val startTime = System.currentTimeMillis()
         val db = DailyNotificationDatabase.getDatabase(context)
         val currentTime = System.currentTimeMillis()
         
@@ -627,7 +628,8 @@ class ReactivationManager(private val context: Context) {
         
         recordRecoveryHistory(db, "cold_start", result)
         
-        Log.i(TAG, "Cold start recovery complete: $result")
+        val duration = System.currentTimeMillis() - startTime
+        Log.i(TAG, "Cold start recovery completed: duration=${duration}ms, missed=$missedCount, rescheduled=$rescheduledCount, verified=$verifiedCount, errors=${missedErrors + rescheduleErrors}")
         return result
     }
     
@@ -652,6 +654,7 @@ class ReactivationManager(private val context: Context) {
      * @return RecoveryResult with counts
      */
     private suspend fun performForceStopRecovery(): RecoveryResult {
+        val startTime = System.currentTimeMillis()
         val db = DailyNotificationDatabase.getDatabase(context)
         val currentTime = System.currentTimeMillis()
         
@@ -707,7 +710,8 @@ class ReactivationManager(private val context: Context) {
         
         recordRecoveryHistory(db, "force_stop", result)
         
-        Log.i(TAG, "Force stop recovery complete: $result")
+        val duration = System.currentTimeMillis() - startTime
+        Log.i(TAG, "Force stop recovery completed: duration=${duration}ms, missed=$missedCount, rescheduled=$rescheduledCount, errors=$errors")
         return result
     }