alerts: per-support-team webhook; printedparts routes low-stock to a chosen team

Support teams gain a webhookurl (migration 7d29 + API + settings-page field), so
a team is a notification target. send_webhook(url=) lets a caller override the
site default with a team's webhook. Printedparts gains a 'alert support team'
setting (printedparts_alert_supportteamid) + selector on its settings page;
low-stock alerts post to that team's webhook, falling back to the site
alert_webhook_url. Email leg unchanged. Same pattern extends to other alerting
plugins (printers low-toner next).

shopdb/core/api/supportteams.py

@@ -64,6 +64,7 @@ def create_support_team():
     team = SupportTeam(
         teamname=data['teamname'],
         teamurl=data.get('teamurl'),
+        webhookurl=data.get('webhookurl'),
         isactive=data.get('isactive', True))
 
     db.session.add(team)
@@ -99,7 +100,7 @@ def update_support_team(team_id: int):
                 f"Support team '{data['teamname']}' already exists",
                 http_code=409)
 
-    for key in ['teamname', 'teamurl', 'isactive']:
+    for key in ['teamname', 'teamurl', 'webhookurl', 'isactive']:
         if key in data:
             setattr(team, key, data[key])
 

shopdb/core/models/supportteam.py

@@ -17,6 +17,9 @@ class SupportTeam(BaseModel):
     supportteamid = db.Column(db.Integer, primary_key=True)
     teamname = db.Column(db.String(100), unique=True, nullable=False)
     teamurl = db.Column(db.Text)  # ServiceNow group deep link, nullable
+    # Teams (or other) webhook this team receives alerts on; alerting plugins
+    # route to it by selecting this team. Nullable = no webhook for this team.
+    webhookurl = db.Column(db.Text)
 
     # Contacts cascade-delete with the team.
     contacts = db.relationship(

shopdb/utils/mailer.py

@@ -225,16 +225,18 @@ def _webhook_payload(fmt, title, text):
     }
 
 
-def send_webhook(title, text):
-    """POST an alert to the configured webhook (Teams, etc.). Best-effort:
-    returns (ok, error); a no-op ((False, None)) when no URL is configured, and
-    never raises so it can never block the caller."""
+def send_webhook(title, text, url=None):
+    """POST an alert to a webhook (Teams, etc.). `url` overrides the site
+    alert_webhook_url (e.g. a support team's own webhook); the payload format
+    still follows alert_webhook_format. Best-effort: returns (ok, error), a
+    no-op ((False, None)) when no URL resolves, and never raises."""
     config = get_webhook_config()
-    if not config['url']:
+    target = (url or '').strip() or config['url']
+    if not target:
         return False, None
     try:
         response = requests.post(
-            config['url'], json=_webhook_payload(config['format'], title, text),
+            target, json=_webhook_payload(config['format'], title, text),
             timeout=10)
         if response.status_code >= 400:
             return False, f'HTTP {response.status_code}'