feat: add Pending status for delivery/technician tasks

- New 'pending' status allows tasks to be created without a schedule,
  acting as a queue for unscheduled work that gets assigned later
- Pending group appears in the Delivery Map sidebar with amber color
- Other modules can create tasks in pending state for scheduling
- scheduled_date no longer required (null for pending tasks)
- New Pending Tasks menu item under Field Service
- Pending filter added to search view

Co-authored-by: Cursor <cursoragent@cursor.com>

fusion_claims/models/technician_task.py

@@ -169,7 +169,6 @@ class FusionTechnicianTask(models.Model):
     # ------------------------------------------------------------------
     scheduled_date = fields.Date(
         string='Scheduled Date',
-        required=True,
         tracking=True,
         default=fields.Date.context_today,
         index=True,
@@ -265,6 +264,7 @@ class FusionTechnicianTask(models.Model):
     # STATUS
     # ------------------------------------------------------------------
     status = fields.Selection([
+        ('pending', 'Pending'),
         ('scheduled', 'Scheduled'),
         ('en_route', 'En Route'),
         ('in_progress', 'In Progress'),
@@ -851,6 +851,7 @@ class FusionTechnicianTask(models.Model):
     @api.depends('status')
     def _compute_color(self):
         color_map = {
+            'pending': 5,       # purple
             'scheduled': 0,     # grey
             'en_route': 4,      # blue
             'in_progress': 2,   # orange
@@ -2126,7 +2127,7 @@ class FusionTechnicianTask(models.Model):
              'time_start', 'time_start_display', 'time_end_display',
              'status', 'scheduled_date', 'travel_time_minutes',
              'x_fc_sync_client_name', 'x_fc_is_shadow', 'x_fc_sync_source'],
-            order='scheduled_date asc, time_start asc',
+            order='scheduled_date asc NULLS LAST, time_start asc',
             limit=500,
         )
         locations = self.env['fusion.technician.location'].get_latest_locations()