fix: add JacksonConfig, clean up McpTools unused import

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: aksOps

src/main/java/io/github/randomcodespace/iq/config/JacksonConfig.java

@@ -0,0 +1,22 @@
+package io.github.randomcodespace.iq.config;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * Provides an ObjectMapper bean when Spring Boot's web auto-configuration
+ * is not active (e.g., indexing profile with WebApplicationType.NONE).
+ */
+@Configuration
+public class JacksonConfig {
+
+    @Bean
+    @ConditionalOnMissingBean(ObjectMapper.class)
+    public ObjectMapper objectMapper() {
+        return new ObjectMapper()
+                .disable(SerializationFeature.FAIL_ON_EMPTY_BEANS);
+    }
+}

src/main/java/io/github/randomcodespace/iq/mcp/McpTools.java

@@ -8,6 +8,7 @@
 import io.github.randomcodespace.iq.query.QueryService;
 import org.springframework.ai.tool.annotation.Tool;
 import org.springframework.ai.tool.annotation.ToolParam;
+import org.springframework.context.annotation.Profile;
 import org.springframework.stereotype.Component;
 
 import java.nio.file.Path;
@@ -20,6 +21,7 @@
  * Tool names match the Python MCP implementation exactly.
  */
 @Component
+@Profile("serving")
 public class McpTools {
 
     private final QueryService queryService;