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/includes/class-instanda-addon.php

@@ -18,7 +18,7 @@ namespace ESP\Instanda;
 
 final class Instanda_AddOn extends \GFFeedAddOn {
 
-    protected $_version                  = '1.0.7';
+    protected $_version                  = '1.1.0';
     protected $_min_gravityforms_version = '2.10.3';
     protected $_slug                     = 'espinstanda';
     protected $_path                     = 'esp-instanda-integration/esp-instanda-integration.php';