Aug 3 - Update scheduled task acknowledged

app/models/scheduled_inspection.py

@@ -130,6 +130,16 @@ class ScheduledInspection(db.Model):
     created_at        = db.Column(db.DateTime, nullable=False, default=now_eastern)
     last_completed_at = db.Column(db.DateTime, nullable=True)
 
+    # ── Receipt acknowledgement (phase47) ────────────────────────────────────
+    # When the assigned inspector confirms they have received/seen this
+    # assignment. Once per assignment: NULL means "awaiting confirmation"; it is
+    # reset to NULL when the schedule is reassigned to a different inspector so
+    # the new assignee must confirm afresh. It is NOT reset when a recurring
+    # schedule rolls forward — the acknowledgement is of the assignment, not of
+    # each occurrence. The acknowledger is always `inspector` (the only person
+    # allowed to confirm), so no separate acknowledged_by column is needed.
+    acknowledged_at   = db.Column(db.DateTime, nullable=True)
+
     # Per-occurrence reminder de-dup flags (reset when a recurring one rolls forward)
     advance_notified = db.Column(db.Boolean, nullable=False, default=False)
     due_notified     = db.Column(db.Boolean, nullable=False, default=False)
@@ -269,6 +279,11 @@ class ScheduledInspection(db.Model):
         """
         return self.end_date is None or d <= self.end_date
 
+    @property
+    def is_acknowledged(self):
+        """True once the assigned inspector has confirmed receipt (phase47)."""
+        return self.acknowledged_at is not None
+
     @property
     def is_expired(self):
         """True once the end date has passed.