feat(02-03): ClickHouse search engine, search controller, and 13 integration tests

- ClickHouseSearchEngine with dynamic WHERE clause building and LIKE escape
- SearchController with GET (basic filters) and POST (advanced JSON body)
- SearchBeanConfig wiring SearchEngine, SearchService, DetailService beans
- 13 integration tests covering all filter types, combinations, pagination, empty results

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

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

@@ -0,0 +1,32 @@
+package com.cameleer3.server.app.config;
+
+import com.cameleer3.server.app.search.ClickHouseSearchEngine;
+import com.cameleer3.server.core.detail.DetailService;
+import com.cameleer3.server.core.search.SearchEngine;
+import com.cameleer3.server.core.search.SearchService;
+import com.cameleer3.server.core.storage.ExecutionRepository;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.jdbc.core.JdbcTemplate;
+
+/**
+ * Creates beans for the search and detail layers.
+ */
+@Configuration
+public class SearchBeanConfig {
+
+    @Bean
+    public SearchEngine searchEngine(JdbcTemplate jdbcTemplate) {
+        return new ClickHouseSearchEngine(jdbcTemplate);
+    }
+
+    @Bean
+    public SearchService searchService(SearchEngine searchEngine) {
+        return new SearchService(searchEngine);
+    }
+
+    @Bean
+    public DetailService detailService(ExecutionRepository executionRepository) {
+        return new DetailService(executionRepository);
+    }
+}