fix(wallet-service): use npm install instead of npm ci

wallet-service doesn't have package-lock.json, npm ci requires it.

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

backend/services/wallet-service/Dockerfile

@@ -16,7 +16,7 @@ COPY nest-cli.json ./
 COPY prisma ./prisma/
 
 # Install dependencies
-RUN npm ci
+RUN npm install
 
 # Generate Prisma client
 RUN npx prisma generate
@@ -34,7 +34,7 @@ WORKDIR /app
 
 # Install production dependencies only
 COPY package*.json ./
-RUN npm ci --only=production
+RUN npm install --omit=dev
 
 # Copy Prisma schema and generate client
 COPY prisma ./prisma/