fix(loyalty): use Code 128 barcode for retail scanner compatibility

Switch wallet pass barcodes from QR to Code 128 format using the
card_number (digits only), so standard retail barcode scanners can
read loyalty cards. Apple Wallet keeps QR as fallback in barcodes
array. Also fix stale Vendor.loyalty_program relationship (now
company-based), add parent init calls in vendor JS components,
and update module docs to reflect Phase 2 completion.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/modules/tenancy/models/vendor.py

@@ -253,14 +253,6 @@ class Vendor(Base, TimestampMixin):
         cascade="all, delete-orphan",
     )
 
-    # Loyalty program (one-to-one)
-    loyalty_program = relationship(
-        "LoyaltyProgram",
-        back_populates="vendor",
-        uselist=False,
-        cascade="all, delete-orphan",
-    )
-
     def __repr__(self):
         """String representation of the Vendor object."""
         return f"<Vendor(id={self.id}, vendor_code='{self.vendor_code}', name='{self.name}', subdomain='{self.subdomain}')>"