fix(2meet-data-optimizer): stop auto-activating entity bridge on install

- install() no longer switches the Hook Bus on or puts user/term/comment
  into dual_write; the now-unused maybe_autoactivate_entity_bridge() is gone
- Hook Bus and Mode_Manager defaults are off/disabled; sites with stored
  modes (incl. aeav_only) keep them since only unset keys use defaults
- Guard run_dbdelta()'s upgrade.php require like install_v2_tables() so
  install() can run under the integration test stub

Verify: InstallerV2Test::test_install_does_not_enable_entity_bridge,
  ModeManagerDefaultsTest; unit 602 OK, integration 421 OK
PR: PR-007

tests/integration/InstallerV2Test.php

@@ -111,6 +111,19 @@ class InstallerV2Test extends TestCase {
 		}
 	}
 
+	public function test_install_does_not_enable_entity_bridge(): void {
+		delete_option( 'wpdo_hook_bus_enabled' );
+		delete_option( 'wpdo_bridge_modes' );
+		delete_option( 'wpdo_entity_bridge_autoactivated_v2' );
+		// Skip the crypto step: it queries $wpdb->options, which InstallerCleanupTest leaves pointing at its own prefix.
+		update_option( 'wpdo_crypto_migrated_v2', '1' );
+
+		TMDO_Installer::install();
+
+		$this->assertFalse( get_option( 'wpdo_hook_bus_enabled' ), 'install() must not switch the Hook Bus on' );
+		$this->assertFalse( get_option( 'wpdo_bridge_modes' ), 'install() must not write bridge modes' );
+	}
+
 	public static function tearDownAfterClass(): void {
 		// Leave v2 tables in place for subsequent tests / dev convenience.
 		// Cleanup happens via wp wpdo cleanup-uae-tables --confirm in real upgrades.

tests/integration/bootstrap.php

@@ -302,6 +302,7 @@ if ( ! function_exists( 'wp_strip_all_tags' ) ) { function wp_strip_all_tags( st
 if ( ! function_exists( 'get_option' ) ) { function get_option( string $key, $default = false ) { return $GLOBALS['_wp_options'][ $key ] ?? $default; } }
 if ( ! function_exists( 'update_option' ) ) { function update_option( string $key, $value ): bool { $GLOBALS['_wp_options'][ $key ] = $value; return true; } }
 if ( ! function_exists( 'delete_option' ) ) { function delete_option( string $key ): bool { unset( $GLOBALS['_wp_options'][ $key ] ); return true; } }
+if ( ! function_exists( 'add_option' ) ) { function add_option( string $key, $value = '', $deprecated = '', $autoload = null ): bool { if ( array_key_exists( $key, $GLOBALS['_wp_options'] ?? array() ) ) { return false; } $GLOBALS['_wp_options'][ $key ] = $value; return true; } }
 if ( ! function_exists( 'get_transient' ) ) { function get_transient( string $key ) { return $GLOBALS['_wp_transients'][ $key ] ?? false; } }
 if ( ! function_exists( 'set_transient' ) ) { function set_transient( string $key, $value, int $exp = 0 ): bool { $GLOBALS['_wp_transients'][ $key ] = $value; return true; } }
 if ( ! function_exists( 'delete_transient' ) ) { function delete_transient( string $key ): bool { unset( $GLOBALS['_wp_transients'][ $key ] ); return true; } }

tests/unit/HookBusBridgeTest.php

@@ -18,9 +18,9 @@ class HookBusBridgeTest extends TestCase {
 
 	// ── is_enabled() ────────────────────────────────────────────────────────
 
-	public function test_is_enabled_default_true(): void {
-		// v2.5.4: Hook Bus is ON by default; option not set → true.
-		$this->assertTrue( WPDO_Hook_Bus_Bridge::is_enabled() );
+	public function test_is_enabled_default_false(): void {
+		// Hook Bus is opt-in; option not set → false. Existing sites store '1' explicitly.
+		$this->assertFalse( WPDO_Hook_Bus_Bridge::is_enabled() );
 	}
 
 	public function test_is_enabled_when_option_set_to_string_one(): void {

tests/unit/ModeManagerDefaultsTest.php

@@ -0,0 +1,50 @@
+<?php
+declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Unit test: TMDO_Mode_Manager defaults.
+ *
+ * A fresh install must not route any entity through the flat tables until an
+ * admin opts in; stored modes (e.g. aeav_only on live sites) must be kept as-is.
+ */
+class ModeManagerDefaultsTest extends TestCase {
+
+	protected function setUp(): void {
+		$GLOBALS['_wp_options'] = array();
+		TMDO_Mode_Manager::reset_cache();
+	}
+
+	protected function tearDown(): void {
+		TMDO_Mode_Manager::reset_cache();
+	}
+
+	public function test_all_entities_default_to_disabled(): void {
+		$this->assertSame(
+			array(
+				'post'    => TMDO_Mode_Manager::MODE_DISABLED,
+				'user'    => TMDO_Mode_Manager::MODE_DISABLED,
+				'term'    => TMDO_Mode_Manager::MODE_DISABLED,
+				'comment' => TMDO_Mode_Manager::MODE_DISABLED,
+			),
+			TMDO_Mode_Manager::all()
+		);
+	}
+
+	public function test_stored_modes_are_kept(): void {
+		update_option(
+			'wpdo_bridge_modes',
+			array(
+				'post' => 'aeav_only',
+				'user' => 'dual_write',
+			)
+		);
+
+		$modes = TMDO_Mode_Manager::all();
+
+		$this->assertSame( 'aeav_only', $modes['post'] );
+		$this->assertSame( 'dual_write', $modes['user'] );
+		$this->assertSame( TMDO_Mode_Manager::MODE_DISABLED, $modes['term'] );
+	}
+}