build: add VCR demo projects to multi-project build

Updates build configuration:

- settings.gradle.kts: include langchain4j-vcr and spring-ai-vcr demos
- build.gradle.kts: configure demo subprojects with dependencies
- core/build.gradle.kts: add testcontainers dependency for VCR

Demo projects inherit common configuration and add their specific
AI framework dependencies (LangChain4J or Spring AI with OpenAI).

Author: bsbodden

build.gradle.kts

@@ -16,6 +16,9 @@ allprojects {
         maven {
             url = uri("https://repo.spring.io/milestone")
         }
+        maven {
+            url = uri("https://repo.spring.io/snapshot")
+        }
     }
 }
 

core/build.gradle.kts

@@ -2,6 +2,7 @@ plugins {
     java
     `java-library`
     `maven-publish`
+    id("io.spring.dependency-management") version "1.1.7"
 }
 
 description = "RedisVL - Vector Library for Java"
@@ -83,6 +84,11 @@ dependencies {
     testImplementation("dev.langchain4j:langchain4j-embeddings-all-minilm-l6-v2:0.36.2")
     testImplementation("dev.langchain4j:langchain4j-hugging-face:0.36.2")
 
+    // Spring AI for VCR testing (optional - users include what they need)
+    // Version managed by spring-ai-bom (spring-ai-model contains EmbeddingModel interface)
+    compileOnly("org.springframework.ai:spring-ai-model")
+    testImplementation("org.springframework.ai:spring-ai-model")
+
     // Cohere for integration tests
     testImplementation("com.cohere:cohere-java:1.8.1")
 
@@ -97,6 +103,15 @@ dependencies {
     testImplementation("net.bytebuddy:byte-buddy-agent:1.14.12")
 }
 
+// Spring AI 1.1.0 - BOM for dependency management
+val springAiVersion = "1.1.0"
+
+dependencyManagement {
+    imports {
+        mavenBom("org.springframework.ai:spring-ai-bom:$springAiVersion")
+    }
+}
+
 // Configure test execution
 tasks.test {
     // Exclude slow and integration tests by default

settings.gradle.kts

@@ -6,11 +6,15 @@ include("docs")
 
 // Demos
 include("demos:rag-multimodal")
+include("demos:langchain4j-vcr")
+include("demos:spring-ai-vcr")
 
 // Configure module locations
 project(":core").projectDir = file("core")
 project(":docs").projectDir = file("docs")
 project(":demos:rag-multimodal").projectDir = file("demos/rag-multimodal")
+project(":demos:langchain4j-vcr").projectDir = file("demos/langchain4j-vcr")
+project(":demos:spring-ai-vcr").projectDir = file("demos/spring-ai-vcr")
 
 // Enable build cache for faster builds
 buildCache {