Remove podcast checklist backend, calendar events and reminder emails; v2.14.3

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

server.js

@@ -21,10 +21,8 @@ import {
   loadDownloadCountsFromDisk,
   loadQrCodesFromDisk,
   loadEpisodePlaysFromDisk,
-  loadPodcastChecklistFromDisk,
   loadAnalyticsEventsFromDisk,
   loadEmailSettingsFromDisk,
-  loadCalendarEventsFromDisk,
   loadAuditLogFromDisk,
   loadWebhooksFromDisk,
   loadStudySessionsFromDisk,
@@ -60,8 +58,6 @@ import { register as registerStudyComments } from './server/routes/study-comment
 import { register as registerStudyCertificate } from './server/routes/study-certificate.js'
 import { register as registerEpisodeScripts } from './server/routes/episode-scripts.js'
 import { register as registerContact } from './server/routes/contact.js'
-import { register as registerCalendarEvents } from './server/routes/calendar-events.js'
-import { startReminderScheduler } from './server/reminder.js'
 import { register as registerInboundEmail } from './server/routes/inbound-email.js'
 import { register as registerQuestions } from './server/routes/questions.js'
 import { register as registerAnalytics } from './server/routes/analytics.js'
@@ -119,7 +115,6 @@ registerStudyComments(app)
 registerStudyCertificate(app)
 registerEpisodeScripts(app)
 registerContact(app)
-registerCalendarEvents(app)
 registerInboundEmail(app)
 registerQuestions(app)
 registerAnalytics(app)
@@ -185,10 +180,8 @@ Promise.all([
   loadDownloadCountsFromDisk(),
   loadQrCodesFromDisk(),
   loadEpisodePlaysFromDisk(),
-  loadPodcastChecklistFromDisk(),
   loadAnalyticsEventsFromDisk(),
   loadEmailSettingsFromDisk(),
-  loadCalendarEventsFromDisk(),
   loadAuditLogFromDisk(),
   loadWebhooksFromDisk(),
   loadStudySessionsFromDisk(),
@@ -209,7 +202,6 @@ Promise.all([
       createBackupSnapshot('scheduled').catch(() => {})
     }, BACKUP_INTERVAL_MS)
 
-    startReminderScheduler()
     startNuggetsSeafileWatcher()
 
     // Purge expired study sessions every hour
@@ -281,7 +273,6 @@ Promise.all([
         state.draftQuestionsWritePromise,
         state.replyTemplatesWritePromise,
         state.replyHistoryWritePromise,
-        state.podcastChecklistWritePromise,
         state.studyUsersWritePromise,
         state.studyCommunityWritePromise,
         state.studyRemindersWritePromise,
@@ -293,7 +284,6 @@ Promise.all([
         state.analyticsEventsWritePromise,
         state.qrCodesWritePromise,
         state.emailSettingsWritePromise,
-        state.calendarEventsWritePromise,
         state.auditLogWritePromise,
         state.webhooksWritePromise,
         state.studySessionsWritePromise,