feat(01-03): add test infrastructure, protocol version interceptor, and app bootstrap

- AbstractClickHouseIT base class with Testcontainers ClickHouse and schema init
- ProtocolVersionInterceptor validates X-Cameleer-Protocol-Version:1 on data/agent paths
- WebConfig registers interceptor with path patterns, excludes health/docs
- Cameleer3ServerApplication with @EnableScheduling and component scanning
- application-test.yml with small buffer config for tests

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

cameleer3-server-app/src/main/java/com/cameleer3/server/app/config/WebConfig.java

@@ -0,0 +1,34 @@
+package com.cameleer3.server.app.config;
+
+import com.cameleer3.server.app.interceptor.ProtocolVersionInterceptor;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+/**
+ * Web MVC configuration.
+ * <p>
+ * Registers the {@link ProtocolVersionInterceptor} on data and agent endpoint paths,
+ * excluding health, API docs, and Swagger UI paths that do not require protocol versioning.
+ */
+@Configuration
+public class WebConfig implements WebMvcConfigurer {
+
+    private final ProtocolVersionInterceptor protocolVersionInterceptor;
+
+    public WebConfig(ProtocolVersionInterceptor protocolVersionInterceptor) {
+        this.protocolVersionInterceptor = protocolVersionInterceptor;
+    }
+
+    @Override
+    public void addInterceptors(InterceptorRegistry registry) {
+        registry.addInterceptor(protocolVersionInterceptor)
+                .addPathPatterns("/api/v1/data/**", "/api/v1/agents/**")
+                .excludePathPatterns(
+                        "/api/v1/health",
+                        "/api/v1/api-docs/**",
+                        "/api/v1/swagger-ui/**",
+                        "/api/v1/swagger-ui.html"
+                );
+    }
+}