search: asset lists search the type column they display

Every asset list shows a Type column (and printers a Model, machines and
network a Vendor), but the search filters only looked at the asset number,
name, serial and hostname. Searching a type returned zero rows: 'Part Washer'
on machines, 'Standard' on PCs, 'Thermal' on printers.

Extend the search on machines, computers, printers, network devices,
measuring tools and the unified asset list to cover the type name plus the
vendor/model where the list shows them. Joins are outer joins so an asset
missing a type or vendor still matches on its own fields; the core list uses
a correlated EXISTS instead, since its type-name filter already joins
AssetType.

plugins/machines/api/routes.py

@@ -3,7 +3,7 @@
 from flask import Blueprint, request
 from flask_jwt_extended import jwt_required
 
-from shopdb.api import db, Asset, AssetType, AuditLog, success_response, error_response, paginated_response, ErrorCodes, get_pagination_params, paginate_query, resolve_dualpath_pairs, dualpath_single_machine_enabled
+from shopdb.api import db, Asset, AssetType, AuditLog, Vendor, success_response, error_response, paginated_response, ErrorCodes, get_pagination_params, paginate_query, resolve_dualpath_pairs, dualpath_single_machine_enabled
 
 from ..models import Machine, MachineType
 
@@ -174,13 +174,23 @@ def list_machines():
     if exactassetnumber := request.args.get('assetnumber'):
         query = query.filter(Asset.assetnumber == exactassetnumber)
 
-    # Search filter
+    # Search filter. Covers what the list actually SHOWS - the asset fields plus
+    # the type and vendor names, which are columns in the table. Searching a type
+    # like 'Part Washer' used to return nothing. Outer joins so a machine with no
+    # type or vendor still matches on its own fields.
     if search := request.args.get('search'):
-        query = query.filter(
+        pattern = f'%{search}%'
+        query = query.outerjoin(
+            MachineType, Machine.machinetypeid == MachineType.machinetypeid
+        ).outerjoin(
+            Vendor, Machine.vendorid == Vendor.vendorid
+        ).filter(
             db.or_(
-                Asset.assetnumber.ilike(f'%{search}%'),
-                Asset.name.ilike(f'%{search}%'),
-                Asset.serialnumber.ilike(f'%{search}%')
+                Asset.assetnumber.ilike(pattern),
+                Asset.name.ilike(pattern),
+                Asset.serialnumber.ilike(pattern),
+                MachineType.machinetype.ilike(pattern),
+                Vendor.vendor.ilike(pattern)
             )
         )