Use Turso RUST_LOG=trace to capture every prepared SQL in probe

The PHP-level query_logger callback wasn't being invoked because
WP_SQLite_Driver creates its own internal connection. Switch to
Turso's tracing crate (RUST_LOG=turso_core::translate=trace) to
capture every SQL statement Turso compiles, regardless of which
PHP layer issued it.

Author: JanJakes

.github/workflows/phpunit-tests-turso.yml

@@ -2019,40 +2019,34 @@ jobs:
         continue-on-error: true
         env:
           LD_PRELOAD: ${{ steps.preload.outputs.value }}
+          # Use Turso's tracing to log every prepared SQL statement.
+          RUST_LOG: 'turso_core::translate=trace,turso_core::vdbe::insn=info'
         working-directory: packages/mysql-on-sqlite
         run: |
           set +e
-          php <<'PHP'
+          php <<'PHP' 2>&1 | head -800
           <?php
-          // Boot the driver, install a query logger on the SQLite
-          // connection, and run the failing test scenarios. Print
-          // every SQL statement that hits Turso so we can see exactly
-          // which one triggers the failure.
+          // Boot the driver, run failing test scenarios. With RUST_LOG
+          // including translate=trace, Turso prints each prepared SQL
+          // to stderr (which we route to stdout for `head -800`).
           require __DIR__ . '/vendor/autoload.php';
           require __DIR__ . '/tests/bootstrap.php';
 
-          function run_with_log(string $label, callable $f): void {
-              echo "=== $label ===\n";
+          function run_test(string $label, callable $f): void {
+              fwrite(STDERR, "\n=== START $label ===\n");
               try {
                   $pdo_class = PHP_VERSION_ID >= 80400 ? PDO\SQLite::class : PDO::class;
                   $sqlite = new $pdo_class('sqlite::memory:');
                   $conn = new WP_SQLite_Connection(['pdo' => $sqlite]);
-                  $idx = 0;
-                  $conn->set_query_logger(function ($sql, $params) use (&$idx) {
-                      $idx++;
-                      $oneline = preg_replace('/\s+/', ' ', trim($sql));
-                      echo sprintf("[%03d] %s\n", $idx, substr($oneline, 0, 240));
-                  });
                   $engine = new WP_SQLite_Driver($conn, 'wp');
                   $f($engine, $sqlite);
-                  echo "OK\n";
+                  fwrite(STDERR, "=== OK $label ===\n");
               } catch (Throwable $e) {
-                  echo 'FAIL: ' . $e->getMessage() . "\n";
+                  fwrite(STDERR, "=== FAIL $label: " . $e->getMessage() . " ===\n");
               }
-              echo "\n";
           }
 
-          run_with_log('testCreateTemporaryTable', function ($engine) {
+          run_test('testCreateTemporaryTable', function ($engine) {
               $engine->query('CREATE TEMPORARY TABLE _tmp_table (
                   ID INTEGER PRIMARY KEY AUTO_INCREMENT NOT NULL,
                   option_name TEXT NOT NULL default \'\',
@@ -2061,14 +2055,14 @@ jobs:
               $engine->query('DROP TEMPORARY TABLE _tmp_table');
           });
 
-          run_with_log('testInformationSchemaTablesFilterByAutoIncrement', function ($engine) {
+          run_test('testInformationSchemaTablesFilterByAutoIncrement', function ($engine) {
               $engine->query('CREATE TABLE low (id INT AUTO_INCREMENT PRIMARY KEY, name TEXT)');
               $engine->query('CREATE TABLE high (id INT AUTO_INCREMENT PRIMARY KEY, name TEXT)');
               $engine->query('CREATE TABLE plain (id INT, name TEXT)');
               $engine->query("INSERT INTO low (name) VALUES ('a')");
               $engine->query("INSERT INTO high (name) VALUES ('a'), ('b'), ('c'), ('d'), ('e')");
               $r = $engine->query('SELECT TABLE_NAME FROM information_schema.tables WHERE `AUTO_INCREMENT` > 3');
-              echo "  -> " . count($r) . " row(s): " . json_encode(array_map(fn($o) => $o->TABLE_NAME, $r)) . "\n";
+              fwrite(STDERR, "  -> " . count($r) . " row(s): " . json_encode(array_map(fn($o) => $o->TABLE_NAME, $r)) . "\n");
           });
           PHP
           echo "(probe step: continue-on-error)"