fix(instanda): hygiene pass + v1.1.0 (uninstall, notices, cron, resubmit, theme)

- F-15: uninstall now removes ALL espinstanda_* options and transients (incl. the
  encrypted password and its self-provisioned key).
- F-16: register the "Gravity Forms required" admin notice unconditionally so it is
  reachable when GF is inactive (gform_loaded never fires then).
- F-22: self-heal the daily retention cron on admin_init (matches the schema self-heal).
- F-19: re-validate the stored payload via Field_Mapper::validate_payload() before a
  resubmit (DB-tamper trust boundary).
- F-20: increment the retry count on resubmit and dispatch the previously-dead
  espinstanda_resubmit_success notification event.
- F-23: emit the theme's Form-5 date-range JS only on pages that embed a Gravity Form
  and disconnect the MutationObserver (was observing the DOM subtree forever).
- F-24: bump plugin to 1.1.0; add readme.txt changelog documenting the audit fixes and
  the required ops actions.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

wp-content/plugins/esp-instanda-integration/uninstall.php

@@ -20,10 +20,19 @@ try {
     // Table name is a trusted internal constant, not user input.
     $wpdb->query("DROP TABLE IF EXISTS {$table}");
 
-    delete_option('espinstanda_db_version');
-    delete_option('espinstanda_operating_mode_audit');
+    // Remove EVERY plugin option and transient - including the encrypted Test password
+    // and its self-provisioned key - so no recoverable secret survives uninstall.
+    $opt = $wpdb->esc_like('espinstanda_') . '%';
+    $tr  = '_transient_' . $wpdb->esc_like('espinstanda_') . '%';
+    $trt = '_transient_timeout_' . $wpdb->esc_like('espinstanda_') . '%';
+    $wpdb->query($wpdb->prepare(
+        "DELETE FROM {$wpdb->options} WHERE option_name LIKE %s OR option_name LIKE %s OR option_name LIKE %s",
+        $opt,
+        $tr,
+        $trt
+    ));
 
-    // Clear any scheduled cleanup that may still be queued.
+    // Clear any scheduled events that may still be queued.
     wp_clear_scheduled_hook('esp_instanda_cleanup');
 } catch (\Throwable $e) {
     if (function_exists('error_log')) {