feat(addon): show AI bot online in Discuss when agent is healthy

Extend cron_ping_all to upsert a bus.presence row for the
activeblue_ai_bot user, mirroring the agent service's reachability:
green dot when /health responds 200, offline otherwise. Drop the cron
interval from 5m to 1m so the presence stays fresh (Odoo's presence
client expects refreshes well under a minute).

addons/activeblue_ai/data/ir_cron.xml

@@ -6,7 +6,7 @@
             <field name="model_id" ref="model_ab_ai_bot"/>
             <field name="state">code</field>
             <field name="code">model.cron_ping_all()</field>
-            <field name="interval_number">5</field>
+            <field name="interval_number">1</field>
             <field name="interval_type">minutes</field>
             <field name="active">True</field>
         </record>

addons/activeblue_ai/models/ab_ai_bot.py

@@ -95,8 +95,33 @@ class AbAiBot(models.Model):
 
     @api.model
     def cron_ping_all(self):
+        any_online = False
         for bot in self.search([('active', '=', True)]):
             try:
                 bot.action_ping()
+                if bot.status == 'online':
+                    any_online = True
             except Exception as exc:
                 _logger.warning('Ping failed for bot %s: %s', bot.id, exc)
+        # Mirror agent-service health to the bot user's Discuss presence so it
+        # shows a green dot when the agent is reachable.
+        self._sync_bot_user_presence(online=any_online)
+
+    @api.model
+    def _sync_bot_user_presence(self, online):
+        bot_user = self.env['res.users'].sudo().search(
+            [('login', 'in', ('activeblue_ai_bot', 'activeblue_ai_bot@local'))], limit=1)
+        if not bot_user:
+            return
+        Presence = self.env.get('bus.presence')
+        if Presence is None:
+            return
+        status = 'online' if online else 'offline'
+        now = fields.Datetime.now()
+        rec = Presence.sudo().search([('user_id', '=', bot_user.id)], limit=1)
+        vals = {'status': status, 'last_poll': now, 'last_presence': now}
+        if rec:
+            rec.write(vals)
+        else:
+            vals['user_id'] = bot_user.id
+            Presence.sudo().create(vals)