fix: handle RejectedExecutionException in all analysis submit paths

After shutdownNow() cancels stuck threads, subsequent executor.submit()
calls throw RejectedExecutionException. This crashed the batch processing
loop instead of gracefully skipping the rejected files.

Fix: wrap all 3 executor.submit() call sites (run, runIndex, processSmartBatch)
with try/catch for RejectedExecutionException — log warning and skip file.

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

Author: aksOps

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

@@ -261,6 +261,7 @@ private AnalysisResult runWithCache(Path root, Integer parallelism, AnalysisCach
                 final int idx = i;
                 final DiscoveredFile file = files.get(idx);
                 final AnalysisCache cacheRef = cache;
+                try {
                 futures.add(executor.submit(() -> {
                     // Check cache first
                     if (cacheRef != null) {
@@ -292,6 +293,9 @@ private AnalysisResult runWithCache(Path root, Integer parallelism, AnalysisCach
                     }
                     return null;
                 }));
+                } catch (java.util.concurrent.RejectedExecutionException e) {
+                    log.warn("Executor rejected task for {}, skipping", file.path());
+                }
             }
 
             // Collect in order -- deterministic regardless of thread completion order
@@ -557,6 +561,7 @@ private AnalysisResult runBatchedWithCache(Path root, Integer parallelism, int b
                     for (int i = 0; i < batch.size(); i++) {
                         final int idx = i;
                         final DiscoveredFile file = batch.get(idx);
+                        try {
                         futures.add(batchExecutorService.submit(() -> {
                             if (incremental) {
                                 try {
@@ -585,6 +590,9 @@ private AnalysisResult runBatchedWithCache(Path root, Integer parallelism, int b
                             }
                             return null;
                         }));
+                        } catch (java.util.concurrent.RejectedExecutionException e) {
+                            log.warn("Executor rejected task for {}, skipping", file.path());
+                        }
                     }
 
                     // Collect in order
@@ -930,6 +938,7 @@ private int[] processSmartBatch(
         for (int i = 0; i < batch.size(); i++) {
             final int idx = i;
             final DiscoveredFile file = batch.get(idx);
+            try {
             futures.add(executor.submit(() -> {
                 if (incremental) {
                     try {
@@ -958,6 +967,9 @@ private int[] processSmartBatch(
                 }
                 return null;
             }));
+            } catch (java.util.concurrent.RejectedExecutionException e) {
+                log.warn("Executor rejected task for {}, skipping", file.path());
+            }
         }
 
         for (int i = 0; i < futures.size(); i++) {