feat: integrate Stripe for page purchases and reconciliation tasks

surfsense_backend/.env.example

@@ -33,6 +33,8 @@ REDIS_APP_URL=redis://localhost:6379/0
 # # Run every 2 hours
 # SCHEDULE_CHECKER_INTERVAL=2h
 SCHEDULE_CHECKER_INTERVAL=5m
+# How often the Stripe reconciliation beat task runs
+STRIPE_RECONCILIATION_INTERVAL=10m
 
 SECRET_KEY=SECRET
 
@@ -42,6 +44,20 @@ SECRET_KEY=SECRET
 
 NEXT_FRONTEND_URL=http://localhost:3000
 
+# Stripe Checkout for pay-as-you-go page packs
+# Configure STRIPE_PRICE_ID to point at your 1,000-page price in Stripe.
+# Pages granted per purchase = quantity * STRIPE_PAGES_PER_UNIT.
+STRIPE_SECRET_KEY=sk_test_...
+STRIPE_WEBHOOK_SECRET=whsec_...
+STRIPE_PRICE_ID=price_...
+STRIPE_PAGES_PER_UNIT=1000
+# Set FALSE to disable new checkout session creation temporarily
+STRIPE_PAGE_BUYING_ENABLED=TRUE
+# Periodic Stripe safety net for purchases left in PENDING (minutes old)
+STRIPE_RECONCILIATION_LOOKBACK_MINUTES=10
+# Max pending purchases to check per reconciliation run
+STRIPE_RECONCILIATION_BATCH_SIZE=100
+
 # Backend URL for OAuth callbacks (optional, set when behind reverse proxy with HTTPS)
 # BACKEND_URL=https://api.yourdomain.com
 
@@ -149,6 +165,14 @@ STT_SERVICE=local/base
 # STT_SERVICE_API_KEY=""
 # STT_SERVICE_API_BASE=
 
+# Video presentation defaults
+# Maximum number of generated slides for a single video presentation.
+VIDEO_PRESENTATION_MAX_SLIDES=30
+# Frames per second used for slide timing calculations.
+VIDEO_PRESENTATION_FPS=30
+# Minimum duration per slide when audio is missing or very short.
+VIDEO_PRESENTATION_DEFAULT_DURATION_IN_FRAMES=300
+
 
 # (Optional) Maximum pages limit per user for ETL services (default: `999999999` for unlimited in OSS version)  
 PAGES_LIMIT=500