feat(android): P3.1-D Instrument database operations with timing

Added timing instrumentation to database query in runBootRecovery():

- Wrapped db.scheduleDao().getEnabled() with timing
- Logs duration and warns if > 100ms
- Logs schedule count for context

Verification:
- TypeScript compiles ✅
- No database contract violations ✅

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

@@ -68,11 +68,19 @@ class ReactivationManager(private val context: Context) {
                         Log.i(TAG, "Starting boot recovery")
                         
                         val db = DailyNotificationDatabase.getDatabase(context)
+                        val dbStartTime = System.currentTimeMillis()
                         val enabledSchedules = try {
                             db.scheduleDao().getEnabled()
                         } catch (e: Exception) {
                             Log.e(TAG, "Failed to load schedules from DB", e)
                             emptyList()
+                        } finally {
+                            val dbDuration = System.currentTimeMillis() - dbStartTime
+                            if (dbDuration > 100) {
+                                Log.w(TAG, "Database query slow: ${dbDuration}ms for getEnabled()")
+                            } else {
+                                Log.d(TAG, "Database query: ${dbDuration}ms, schedules=${enabledSchedules.size}")
+                            }
                         }
                         
                         if (enabledSchedules.isEmpty()) {