fix: use exact match for ID fields in full-text search

ID fields (execution_id, correlation_id, exchange_id) should use
exact equality, not LIKE with wildcards. LIKE is only needed for
the _search_text full-text columns.

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

cameleer3-server-app/src/main/java/com/cameleer3/server/app/search/ClickHouseSearchIndex.java

@@ -179,16 +179,17 @@ public class ClickHouseSearchIndex implements SearchIndex {
             params.add(request.durationMax());
         }
 
-        // Global full-text search: ID fields, execution-level _search_text, OR processor-level _search_text
+        // Global full-text search: exact ID match, full-text on execution + processor level
         if (request.text() != null && !request.text().isBlank()) {
-            String likeTerm = "%" + escapeLike(request.text()) + "%";
-            conditions.add("(execution_id LIKE ? OR correlation_id LIKE ? OR exchange_id LIKE ?"
+            String term = escapeLike(request.text());
+            String likeTerm = "%" + term + "%";
+            conditions.add("(execution_id = ? OR correlation_id = ? OR exchange_id = ?"
                     + " OR _search_text LIKE ? OR execution_id IN ("
                     + "SELECT DISTINCT execution_id FROM processor_executions "
                     + "WHERE tenant_id = 'default' AND _search_text LIKE ?))");
-            params.add(likeTerm);
-            params.add(likeTerm);
-            params.add(likeTerm);
+            params.add(term);
+            params.add(term);
+            params.add(term);
             params.add(likeTerm);
             params.add(likeTerm);
         }