refactor(events): harden V3 String-Only ID vision and fix Session Alert store error

- Standardized Event module logic files to strictly use random string IDs, ensuring frontend consistency and avoiding 'Integer Trap' 404s.
- Refactored 'ae_comp__event_session_alert.svelte' to accept a plain object instead of a store/observable, resolving the 'store_invalid_shape' error in list loops.
- Updated all callers of the alert component to pass unwrapped session objects.
- Cleaned up event-related UI components to remove redundant '_random' field lookups and align with V3 CRUD patterns.
- Updated project metadata (GEMINI.md, TODO.md) to reflect the new memory structure and latest hardened state.

src/routes/events/ae_comp__event_session_obj_li.svelte

@@ -142,7 +142,7 @@
                         <td>
                             {#if session_obj?.alert && $ae_loc.trusted_access}
                                 <Comp_event_session_alert
-                                    lq__event_session_obj={session_obj}
+                                    event_session_obj={session_obj}
                                     {log_lvl}
                                 />
                             {/if}
@@ -191,7 +191,7 @@
                                     </a>
 
                                     {#if (show__session_presentations || show__session_files) && $ae_loc.manager_access}
-                                        <button 
+                                        <button
                                             class="btn btn-icon btn-sm variant-soft-surface"
                                             onclick={() => toggle_details(session_obj.event_session_id)}
                                             title="Toggle Presenters & Files"