feat(feature-store): add AI/ML Feature Store use case

.github/dependabot.yml

@@ -279,3 +279,40 @@ updates:
       arcadedb-docker:
         patterns:
           - "arcadedata/arcadedb"
+
+  # ── Feature Store ──────────────────────────────────────────────────────────
+  - package-ecosystem: "maven"
+    directory: "/feature-store/java"
+    schedule:
+      interval: weekly
+      day: "sunday"
+    open-pull-requests-limit: 20
+    groups:
+      arcadedb:
+        patterns:
+          - "com.arcadedb:*"
+      maven-plugins:
+        patterns:
+          - "org.apache.maven.plugins:*"
+
+  - package-ecosystem: "npm"
+    directory: "/feature-store/js"
+    schedule:
+      interval: weekly
+      day: "sunday"
+    open-pull-requests-limit: 10
+    groups:
+      node-pg:
+        patterns:
+          - "pg"
+
+  - package-ecosystem: "docker-compose"
+    directory: "/feature-store"
+    schedule:
+      interval: weekly
+      day: "sunday"
+    open-pull-requests-limit: 10
+    groups:
+      arcadedb-docker:
+        patterns:
+          - "arcadedata/arcadedb"

.github/workflows/feature-store.yml

@@ -0,0 +1,97 @@
+name: Feature Store CI
+
+on:
+  push:
+    paths:
+      - feature-store/**
+      - .github/workflows/feature-store.yml
+  pull_request:
+    paths:
+      - feature-store/**
+      - .github/workflows/feature-store.yml
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    permissions:
+      contents: read
+    strategy:
+      fail-fast: false
+      matrix:
+        runner: [curl, java, js]
+
+    env:
+      ARCADEDB_URL: http://localhost:2480
+      ARCADEDB_USER: root
+      ARCADEDB_PASS: arcadedb
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          fetch-depth: 1
+
+      - name: Set up Java
+        if: matrix.runner == 'java'
+        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5.2.0
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+
+      - name: Cache Maven repository
+        if: matrix.runner == 'java'
+        uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5.0.4
+        with:
+          path: ~/.m2
+          key: ${{ runner.os }}-m2-feature-store-${{ hashFiles('feature-store/java/pom.xml') }}
+          restore-keys: ${{ runner.os }}-m2-feature-store-
+
+      - name: Set up Node.js
+        if: matrix.runner == 'js'
+        uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
+        with:
+          node-version: '22'
+
+      - name: Cache npm
+        if: matrix.runner == 'js'
+        uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5.0.4
+        with:
+          path: ~/.npm
+          key: ${{ runner.os }}-npm-feature-store-${{ hashFiles('feature-store/js/package.json') }}
+          restore-keys: ${{ runner.os }}-npm-feature-store-
+
+      - name: Install JS dependencies
+        if: matrix.runner == 'js'
+        working-directory: feature-store/js
+        run: npm install
+
+      - name: Start ArcadeDB
+        working-directory: feature-store
+        run: docker compose up -d
+
+      - name: Setup database
+        working-directory: feature-store
+        run: ./setup.sh
+
+      - name: Run curl queries
+        if: matrix.runner == 'curl'
+        working-directory: feature-store
+        run: ./queries/queries.sh
+
+      - name: Build and run Java
+        if: matrix.runner == 'java'
+        working-directory: feature-store/java
+        run: |
+          mvn package --no-transfer-progress
+          java -jar target/feature-store.jar
+
+      - name: Run JavaScript queries
+        if: matrix.runner == 'js'
+        working-directory: feature-store/js
+        run: node feature-store.js
+
+      - name: Teardown
+        if: always()
+        working-directory: feature-store
+        run: docker compose down

CLAUDE.md

@@ -16,6 +16,7 @@ A collection of self-contained projects demonstrating [ArcadeDB](https://arcaded
 | `fraud-detection/` | `FraudDetection` | 26.3.1 | 21 | HTTP API (`arcadedb-network`) |
 | `supply-chain/` | `SupplyChain` | 26.3.1 | 21 | HTTP API (`arcadedb-network`) + PostgreSQL (`pg`) |
 | `iam/` | `IAM` | 26.3.1 | 21 | HTTP API (`arcadedb-network`) + PostgreSQL (`psycopg`) |
+| `feature-store/` | `FeatureStore` | 26.3.2 | 21 | HTTP API (`arcadedb-network`) + PostgreSQL (`pg`) |
 
 ## Directory Structure (per use case)
 

README.md

@@ -18,6 +18,7 @@ and runnable demos via both `curl` and a Java program.
 | [supply-chain](./supply-chain/) | Supply chain management with multi-tier visibility | Graph traversal, Vector similarity, Time-series, PostgreSQL protocol, JavaScript |
 | [iam](./iam/) | Identity & Access Management | Graph traversal, Time-series, Vector similarity, PostgreSQL protocol, Python |
 | [customer-360](./customer-360/) | Unified customer view with identity resolution and churn prediction | Graph traversal, Documents, Vectors, Full-text search, OpenCypher |
+| [feature-store](./feature-store/) | Unified ML feature store for fraud, recommendations, and maintenance | Graph traversal, Vector similarity, Time-series, PostgreSQL protocol, JavaScript |
 
 ## Structure