chore(sonar): clean unused imports, suppressions, and private members (#58)

Mechanical cleanup to drop SonarCloud code smells:
- 89 unused imports removed across 55 files
- 5 unused private static final fields removed (regex patterns never referenced)
- 4 unused private methods removed
- 6 unused local variables removed
- 39 unnecessary @SuppressWarnings("unchecked") annotations removed

Zero behavior change. All 3278 tests pass.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: aksOps

src/main/java/io/github/randomcodespace/iq/analyzer/StructuredParser.java

@@ -63,7 +63,6 @@ public Object parse(String language, String content, String filePath) {
     // Individual parsers
     // ------------------------------------------------------------------
 
-    @SuppressWarnings("unchecked")
     private Object parseYaml(String content) {
         var yaml = new Yaml(new org.yaml.snakeyaml.constructor.SafeConstructor(new org.yaml.snakeyaml.LoaderOptions()));
         var docs = new java.util.ArrayList<>();
@@ -82,7 +81,6 @@ private Object parseYaml(String content) {
         return result;
     }
 
-    @SuppressWarnings("unchecked")
     private Object parseJson(String content) throws Exception {
         Object data = objectMapper.readValue(content, Object.class);
         Map<String, Object> result = new LinkedHashMap<>();

src/main/java/io/github/randomcodespace/iq/analyzer/linker/EntityLinker.java

@@ -9,7 +9,6 @@
 import org.springframework.stereotype.Component;
 
 import java.util.ArrayList;
-import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;

src/main/java/io/github/randomcodespace/iq/analyzer/linker/ModuleContainmentLinker.java

@@ -9,7 +9,6 @@
 import org.springframework.stereotype.Component;
 
 import java.util.ArrayList;
-import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;

src/main/java/io/github/randomcodespace/iq/cache/AnalysisCache.java

@@ -15,7 +15,6 @@
 import java.nio.file.Path;
 import java.sql.Connection;
 import java.sql.DriverManager;
-import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.time.Instant;

src/main/java/io/github/randomcodespace/iq/cli/BundleCommand.java

@@ -21,9 +21,7 @@
 import java.nio.file.Path;
 import java.text.NumberFormat;
 import java.time.Instant;
-import java.util.LinkedHashMap;
 import java.util.Locale;
-import java.util.Map;
 import java.util.Optional;
 import java.util.concurrent.Callable;
 import java.util.stream.Stream;

src/main/java/io/github/randomcodespace/iq/cli/PluginsCommand.java

@@ -16,7 +16,6 @@
 import java.nio.file.SimpleFileVisitor;
 import java.nio.file.attribute.BasicFileAttributes;
 import java.util.ArrayList;
-import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;

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

@@ -126,7 +126,6 @@ private record LegacyParse(CodeIqUnifiedConfig config, int translatedKeyCount) {
      * (which have no legacy flat equivalent) are still read via the unified
      * loader path and composed into the overlay.
      */
-    @SuppressWarnings("unchecked")
     private static LegacyParse readAndTranslateLegacy(Path oldFile) {
         Map<String, Object> raw;
         try {
@@ -196,7 +195,6 @@ private static int countLegacyKeys(Map<String, Object> raw) {
      * {@code null} so {@link io.github.randomcodespace.iq.config.unified.ConfigMerger}
      * correctly falls through to lower layers.
      */
-    @SuppressWarnings("unchecked")
     static CodeIqUnifiedConfig translateLegacyToUnified(Map<String, Object> raw) {
         // --- project layer ---
         String root = raw.containsKey("root_path") ? String.valueOf(raw.get("root_path")) : null;

src/main/java/io/github/randomcodespace/iq/detector/csharp/CSharpStructuresDetector.java

@@ -1,7 +1,6 @@
 package io.github.randomcodespace.iq.detector.csharp;
 
 import io.github.randomcodespace.iq.detector.AbstractAntlrDetector;
-import io.github.randomcodespace.iq.grammar.AntlrParserFactory;
 import io.github.randomcodespace.iq.detector.DetectorContext;
 import io.github.randomcodespace.iq.detector.DetectorResult;
 import io.github.randomcodespace.iq.model.CodeEdge;
@@ -36,7 +35,6 @@ public class CSharpStructuresDetector extends AbstractAntlrDetector {
     private static final Pattern USING_RE = Pattern.compile("^\\s*using\\s+([\\w.]+)\\s*;", Pattern.MULTILINE);
     private static final Pattern HTTP_ATTR_RE = Pattern.compile("\\[(Http(?:Get|Post|Put|Delete|Patch))\\s*(?:\\(\"([^\"]*)\"\\))?\\]");
     private static final Pattern ROUTE_RE = Pattern.compile("\\[Route\\(\"([^\"]*)\"\\)\\]");
-    private static final Pattern API_CONTROLLER_RE = Pattern.compile("\\[ApiController\\]");
     private static final Pattern METHOD_RE = Pattern.compile("(?:public|protected|private|internal)\\s+(?:static\\s+|virtual\\s+|override\\s+|async\\s+|abstract\\s+)*(?:[\\w<>\\[\\]?,\\s]+)\\s+(\\w+)\\s*\\(");
 
     @Override

src/main/java/io/github/randomcodespace/iq/detector/jvm/java/GraphqlResolverDetector.java

@@ -34,7 +34,6 @@ public class GraphqlResolverDetector extends AbstractRegexDetector {
     private static final Pattern MUTATION_MAPPING_RE = Pattern.compile("@MutationMapping(?:\\s*\\(\\s*(?:name\\s*=\\s*)?\"([^\"]*)\"\\s*\\))?");
     private static final Pattern SUBSCRIPTION_MAPPING_RE = Pattern.compile("@SubscriptionMapping(?:\\s*\\(\\s*(?:name\\s*=\\s*)?\"([^\"]*)\"\\s*\\))?");
     private static final Pattern SCHEMA_MAPPING_RE = Pattern.compile("@SchemaMapping\\s*\\(\\s*(?:typeName\\s*=\\s*\"([^\"]*)\")?");
-    private static final Pattern BATCH_MAPPING_RE = Pattern.compile("@BatchMapping(?:\\s*\\(\\s*(?:field\\s*=\\s*)?\"([^\"]*)\"\\s*\\))?");
     private static final Pattern DGS_QUERY_RE = Pattern.compile("@DgsQuery(?:\\s*\\(\\s*field\\s*=\\s*\"([^\"]*)\"\\s*\\))?");
     private static final Pattern DGS_MUTATION_RE = Pattern.compile("@DgsMutation(?:\\s*\\(\\s*field\\s*=\\s*\"([^\"]*)\"\\s*\\))?");
     private static final Pattern DGS_SUBSCRIPTION_RE = Pattern.compile("@DgsSubscription(?:\\s*\\(\\s*field\\s*=\\s*\"([^\"]*)\"\\s*\\))?");

src/main/java/io/github/randomcodespace/iq/detector/jvm/java/JpaEntityDetector.java

@@ -52,7 +52,6 @@ public class JpaEntityDetector extends AbstractJavaParserDetector {
             "ManyToMany", "many_to_many");
 
     // ---- Regex fallback patterns ----
-    private static final Pattern ENTITY_RE = Pattern.compile("@Entity");
     private static final Pattern TABLE_RE = Pattern.compile("@Table\\s*\\(\\s*(?:name\\s*=\\s*)?\"(\\w+)\"");
     private static final Pattern CLASS_RE = Pattern.compile("(?:public\\s+)?class\\s+(\\w+)");
     private static final Pattern COLUMN_RE = Pattern.compile("@Column\\s*\\(([^)]*)\\)");