July 3rd - Review and optimize codes

app/models/__init__.py

@@ -5,5 +5,4 @@ from app.models.inspection import (InspectionTemplate, ChecklistItem,
 from app.models.issue import Issue
 from app.models.project import Project, CustomerAssignment
 from app.models.api_token import RefreshToken, DeviceToken
-from app.models.notification_matrix import NotificationMatrix
-from app.models.device_registration import DeviceRegistration
+from app.models.notification_matrix import NotificationMatrix

app/models/device_registration.py

@@ -1,24 +0,0 @@
-# app/models/device_registration.py
-# -----------------------------------
-# Tracks iOS devices that have registered with the server.
-# One row per physical device — upserted on every app foreground.
-
-from app import db
-from app.utils.time_utils import now_eastern
-
-
-class DeviceRegistration(db.Model):
-    __tablename__ = 'device_registrations'
-
-    id            = db.Column(db.Integer,     primary_key=True)
-    # Stable UUID generated on first launch and stored in iOS Keychain.
-    # Unique across all devices; survives app restarts but not device wipes.
-    device_id     = db.Column(db.String(64),  nullable=False, unique=True, index=True)
-    user_id       = db.Column(db.Integer,     db.ForeignKey('users.id'), nullable=False, index=True)
-    device_name   = db.Column(db.String(255), nullable=False, default='')
-    app_version   = db.Column(db.String(32),  nullable=False, default='')
-    ios_version   = db.Column(db.String(32),  nullable=False, default='')
-    registered_at = db.Column(db.DateTime,    nullable=False, default=now_eastern)
-    last_seen_at  = db.Column(db.DateTime,    nullable=False, default=now_eastern)
-
-    user = db.relationship('User', backref=db.backref('devices', lazy='dynamic'))