Test: Add verbose header and diagnostics to sqlite_autocommit test

Added detailed test header explaining test purpose and scenarios.
Added diagnostic messages for connection attempt, success, and failure.

test/tap/tests/sqlite_autocommit-t.cpp

@@ -24,17 +24,43 @@ int main(int argc, char** argv) {
 		return exit_status();
 
 	plan(48);
-	diag("Testing autocommit and transaction in SQLite3 Server");
+
+	// Verbose test header
+	diag("================================================================================");
+	diag("Test: sqlite_autocommit-t");
+	diag("================================================================================");
+	diag("This test verifies that ProxySQL correctly handles autocommit and transaction");
+	diag("status flags when communicating with a SQLite3 backend server.");
+	diag("");
+	diag("Test scenarios:");
+	diag("  - SET autocommit=0: Verify SERVER_STATUS_AUTOCOMMIT is cleared");
+	diag("  - SET autocommit=1: Verify SERVER_STATUS_AUTOCOMMIT is set");
+	diag("  - SELECT queries: Verify SERVER_STATUS_IN_TRANS is correctly set/cleared");
+	diag("  - FOR UPDATE and LOCK IN SHARE MODE: Verify transaction state");
+	diag("  - UPDATE queries: Verify transaction state during DML operations");
+	diag("  - COMMIT: Verify transaction state is cleared after commit");
+	diag("");
+	diag("Connection parameters:");
+	diag("  - Host: %s", cl.host);
+	diag("  - Port: 6030 (SQLite3 Server)");
+	diag("  - Username: %s", cl.username);
+	diag("================================================================================");
+	diag("");
 
 	MYSQL* mysql = mysql_init(NULL);
-	if (!mysql)
+	if (!mysql) {
+		diag("Failed to initialize MySQL handle");
 		return exit_status();
+	}
 
+	diag("Attempting to connect to SQLite3 Server at %s:6030", cl.host);
 	if (!mysql_real_connect(mysql, cl.host, cl.username, cl.password, NULL, 6030, NULL, 0)) {
-	    fprintf(stderr, "Failed to connect to database: Error: %s\n",
-	              mysql_error(mysql));
+		diag("Failed to connect to SQLite3 Server: Error: %s", mysql_error(mysql));
+		diag("Connection details: host=%s, port=6030, username=%s", cl.host, cl.username);
 		return exit_status();
 	}
+	diag("Successfully connected to SQLite3 Server");
+	diag("");
 	MYSQL_RES *res;
 	if (create_table_test_sqlite_sbtest1(100,mysql)) {
 		fprintf(stderr, "File %s, line %d, Error: create_table_test_sbtest1() failed\n", __FILE__, __LINE__);