Rename the equipment domain to machines; retype the models catalog (ADR-011)

The equipment plugin is now the machines plugin, ending the UI-vs-code
vocabulary split while the contract is pre-1.0 and nothing external
depends on the old names.

- plugins/equipment -> plugins/machines: manifest, class, /api/machines,
  machines.* permissions, registry key (with an auto-migrating load shim
  for existing installs).
- Tables: equipment -> machines (equipmentid -> machineid) and
  equipmenttypes -> machinetypes, renamed in the plugin's own migration
  chain (machines0002rename), idempotent for both upgrading and fresh
  installs.
- The legacy core machinetypes lookup actually types the vendor MODELS
  catalog, so it is renamed losslessly to modeltypes
  (models.modeltypeid, /api/modeltypes, Model Types settings page)
  rather than collapsed, freeing the machinetypes name. Core migration
  7d17_machines_rename also flips data in place: assettypes row
  equipment -> machine, auditlog entitytype, identifier_/search_
  settings keys, permission rows, and renames alembic_version_equipment.
- Frontend: machinesApi/modeltypesApi, item.machine response shape,
  assettype value compares 'equipment' -> 'machine' (map, search,
  custom fields, relationships), routes machines.js with plugin gating
  retagged, /print/machine-badge, Machine Types (subtypes) and Model
  Types (catalog) settings pages, machines-by-type report id.
- Docs swept; ADRs left as history per the authoring rule.

Upgrade: flask db upgrade then flask plugin upgrade-all.

Verified: dev DB flipped live (262 machines, 35 modeltypes, 95 models
retyped, zero equipment tables remain); fresh scratch-MySQL install
produces the new names; 341 tests green; naming/style green; frontend
builds; live E2E on machines list/detail, PC relationships, map,
reports, and both settings pages.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

shopdb/core/models/model.py

@@ -1,20 +1,20 @@
-"""Model (equipment model number) model."""
+"""Model (vendor catalog model number) model."""
 
 from shopdb.extensions import db
 from .base import BaseModel
 
 
 class Model(BaseModel):
-    """Equipment/device model information."""
+    """Vendor catalog model information (machines, PCs, printers, network)."""
     __tablename__ = 'models'
 
     modelnumberid = db.Column(db.Integer, primary_key=True)
     modelnumber = db.Column(db.String(100), nullable=False)
 
-    # Link to machine type (what kind of equipment this model is for)
-    machinetypeid = db.Column(
+    # Link to model type (what kind of thing this catalog model is for)
+    modeltypeid = db.Column(
         db.Integer,
-        db.ForeignKey('machinetypes.machinetypeid'),
+        db.ForeignKey('modeltypes.modeltypeid'),
         nullable=True
     )
 
@@ -31,7 +31,7 @@ class Model(BaseModel):
     notes = db.Column(db.Text)
 
     # Relationships
-    machinetype = db.relationship('MachineType', backref='models')
+    modeltype = db.relationship('ModelType', backref='models')
     vendor = db.relationship('Vendor', backref='models')
 
     # Unique constraint on modelnumber + vendor