fix(2meet-data-optimizer): 1.4.2 acceptance fixes for archive sweep and uninstall

- Archive sweep waits until idx_original_meta exists (a plugin update does
  not run dbDelta; without the index NOT EXISTS scans the archive per row)
- Duplicate archive cleanup runs from WP-CLI only, never in a web activation
- Uninstall keeps the LatePoint add-on's tmdo_latepoint_db_version
- AJAX save errors stay on screen instead of fading after 2.5 s
- Verify: 2 new integration tests; unit 711, integration 612, phpcs 0, stan OK
- PR: PR-141 (2.4.2 correctness review)

includes/class-tmdo-installer.php

@@ -218,7 +218,8 @@ class TMDO_Installer {
 		self::install_v2_tables();
 
 		// 1.4.2: archive sweeps before this release copied trashed meta daily.
-		if ( class_exists( 'TMDO_Zone_Archive' ) ) {
+		// One unbounded DELETE: CLI only, never in a web activation.
+		if ( defined( 'WP_CLI' ) && WP_CLI && class_exists( 'TMDO_Zone_Archive' ) ) {
 			global $wpdb;
 			$archive = TMDO_Zone_Archive::table();
 			if ( $archive === $wpdb->get_var( $wpdb->prepare( 'SHOW TABLES LIKE %s', $wpdb->esc_like( $archive ) ) ) ) {
@@ -993,6 +994,7 @@ class TMDO_Installer {
 		// accidental option removal.
 		// 1.4.2: tmdo_* options and their transients too (tmdo_schema_deferred,
 		// tmdo_entity_indexes, tmdo_cov_* …) — a reinstall saw stale ones.
+		// tmdo_latepoint_* belongs to the LatePoint add-on.
 		foreach ( array( 'wpdo_', 'tmdo_', '_transient_tmdo_', '_transient_timeout_tmdo_' ) as $prefix ) {
 			$residual = $wpdb->get_col(
 				$wpdb->prepare(
@@ -1001,7 +1003,7 @@ class TMDO_Installer {
 				)
 			);
 			foreach ( (array) $residual as $opt ) {
-				if ( preg_match( '/^(_transient_(timeout_)?)?(wpdo|tmdo)_[a-zA-Z0-9_]+$/', $opt ) && delete_option( $opt ) ) {
+				if ( preg_match( '/^(_transient_(timeout_)?)?(wpdo|tmdo)_(?!latepoint_)[a-zA-Z0-9_]+$/', $opt ) && delete_option( $opt ) ) {
 					++$options_deleted;
 				}
 			}