Merge origin/main: resolve conflicts keeping both email/Mealie and WhatsApp/Mailgun/Obsidian work

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.env.example

@@ -65,3 +65,43 @@ MEALIE_API_TOKEN=your-mealie-api-token
 # Email Encryption Key (32-byte URL-safe base64)
 # Generate with: python -c "from cryptography.fernet import Fernet; print(Fernet.generate_key().decode())"
 FERNET_KEY=your-fernet-key-here
+
+# Twilio Configuration (WhatsApp)
+TWILIO_ACCOUNT_SID=your-twilio-account-sid
+TWILIO_AUTH_TOKEN=your-twilio-auth-token
+TWILIO_WHATSAPP_NUMBER=whatsapp:+14155238886
+# Comma-separated list of WhatsApp numbers allowed to use the service (e.g., whatsapp:+1234567890)
+# Use * to allow any number
+ALLOWED_WHATSAPP_NUMBERS=
+# Set to false to disable Twilio signature validation in development
+TWILIO_SIGNATURE_VALIDATION=true
+# If behind a reverse proxy, set this to your public webhook URL so signature validation works
+# TWILIO_WEBHOOK_URL=https://your-domain.com/api/whatsapp/webhook
+# Rate limiting: max messages per window (default: 10 messages per 60 seconds)
+# WHATSAPP_RATE_LIMIT_MAX=10
+# WHATSAPP_RATE_LIMIT_WINDOW=60
+
+# Mailgun Configuration (Email channel)
+MAILGUN_API_KEY=
+MAILGUN_DOMAIN=
+MAILGUN_WEBHOOK_SIGNING_KEY=
+EMAIL_HMAC_SECRET=
+# Rate limiting: max emails per window (default: 5 per 300 seconds)
+# EMAIL_RATE_LIMIT_MAX=5
+# EMAIL_RATE_LIMIT_WINDOW=300
+# Set to false to disable Mailgun signature validation in development
+MAILGUN_SIGNATURE_VALIDATION=true
+
+# Obsidian Configuration (headless sync)
+# Auth token from Obsidian account (Settings → Account → API token)
+OBSIDIAN_AUTH_TOKEN=your-obsidian-auth-token
+# Vault ID to sync (found in Obsidian sync settings)
+OBSIDIAN_VAULT_ID=your-vault-id
+# End-to-end encryption password (if vault uses E2E encryption)
+OBSIDIAN_E2E_PASSWORD=
+# Device name shown in Obsidian sync activity
+OBSIDIAN_DEVICE_NAME=simbarag
+# Set to true to run continuous sync in the background
+OBSIDIAN_CONTINUOUS_SYNC=false
+# Local path to Obsidian vault (where files are synced)
+OBSIDIAN_VAULT_PATH=/app/data/obsidian