feat(search-service): add full-text search microservice with Elasticsearch integration, Dockerfile, and basic endpoints

Author: AugistineCreates

microservices/search-service/Dockerfile

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+FROM node:20-alpine AS builder
+WORKDIR /app
+COPY package*.json ./
+RUN npm ci
+COPY . .
+RUN npm run build
+
+FROM node:20-alpine
+WORKDIR /app
+COPY --from=builder /app/dist ./dist
+COPY --from=builder /app/package*.json ./
+RUN npm ci --production
+CMD ["node", "dist/main"]

microservices/search-service/README.md

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+# Search Service
+
+This microservice provides full‑text search, filtering, faceting, autocomplete and analytics using Elasticsearch.