feat(gro-194): SMS provider service with Telnyx SDK integration

- Added telnyx npm package
- Created sms.ts with SmsProvider interface
- Implemented TelnyxProvider with sendSms() and validateWebhookSignature()
- Added createSmsProvider() factory function
- Added smsSend() convenience function that skips when SMS_ENABLED=false
- Provider abstraction allows future Twilio or other providers
- E.164 phone validation on send
- Webhook signature verification using HMAC-SHA256

Co-Authored-By: Paperclip <noreply@paperclip.ing>

generate_dogs.sh

@@ -0,0 +1,65 @@
+#!/bin/bash
+
+API_HOST="https://api.minimax.io"
+API_KEY="$MINIMAX_API_KEY"
+OUTPUT_DIR="minimax-output"
+
+mkdir -p "$OUTPUT_DIR"
+
+# Diverse dog image prompts
+declare -a PROMPTS=(
+  "A beautiful red Irish Setter with long flowing silky coat, standing proudly in golden hour sunlight, professional pet portrait photography, warm tones"
+  "A fluffy white Pomeranian puppy with thick fluffy coat, sitting alert with bright expression, studio white background, cute grooming"
+  "A black Schnauzer with distinctive full beard and mustache, freshly groomed with neat styling, professional grooming salon setting"
+  "A cream and white Cavalier King Charles Spaniel with silky coat, gentle sad eyes, soft warm indoor lighting, elegant pose"
+  "A brown and white Basset Hound with long droopy ears, lying down in relaxed pose, natural outdoor setting, peaceful expression"
+  "A black and tan miniature Dachshund with glossy coat, alert standing pose, warm studio lighting, detailed paws visible"
+  "A white fluffy Bichon Frise after professional grooming with rounded topknot, happy bouncy expression, bright cheerful background"
+  "A muscular fawn Boxer dog, athletic build, standing confidently outdoors in park, energetic expression, natural lighting"
+  "A blue merle Shetland Sheepdog with alert ears and fluffy coat, running happily, green grass field background, vibrant"
+  "A buff colored Cocker Spaniel with beautiful silky coat, friendly gentle expression, warm natural window lighting, indoor"
+)
+
+declare -a FILENAMES=(
+  "dog-setter-red-sunlit.png"
+  "dog-pomeranian-white-studio.png"
+  "dog-schnauzer-black-groomed.png"
+  "dog-cavalier-cream-gentle.png"
+  "dog-basset-brown-white.png"
+  "dog-dachshund-black-tan.png"
+  "dog-bichon-white-groomed.png"
+  "dog-boxer-fawn-athletic.png"
+  "dog-sheepdog-merle-running.png"
+  "dog-cocker-buff-friendly.png"
+)
+
+echo "Generating ${#PROMPTS[@]} diverse dog images..."
+
+for i in "${!PROMPTS[@]}"; do
+  PROMPT="${PROMPTS[$i]}"
+  FILENAME="${FILENAMES[$i]}"
+  
+  echo -n "[$((i+1))/${#PROMPTS[@]}] $FILENAME... "
+  
+  RESPONSE=$(curl -s -X POST "${API_HOST}/v1/image_generation" \
+    -H "Authorization: Bearer ${API_KEY}" \
+    -H "Content-Type: application/json" \
+    -d "{\"model\":\"image-01\",\"prompt\":\"${PROMPT}\",\"image_count\":1}")
+  
+  # Extract image URL from response
+  IMAGE_URL=$(echo "$RESPONSE" | grep -o '"image_urls":\["\([^"]*\)' | cut -d'"' -f4)
+  
+  if [ -n "$IMAGE_URL" ]; then
+    curl -s "$IMAGE_URL" -o "$OUTPUT_DIR/$FILENAME" 2>/dev/null
+    if [ -f "$OUTPUT_DIR/$FILENAME" ] && [ -s "$OUTPUT_DIR/$FILENAME" ]; then
+      echo "✓"
+    else
+      echo "✗ (download failed)"
+    fi
+  else
+    echo "✗ (no URL)"
+  fi
+done
+
+echo "Done! Generated images in $OUTPUT_DIR/"
+ls -lh "$OUTPUT_DIR"/dog-*.png 2>/dev/null | wc -l