feat: trim platform modules, rename platforms, fix seed output

- Rename platforms: Orion OMS → OMS, Orion → Wizard, Loyalty+ → Loyalty
- Per-platform module assignment: core modules always enabled, optional
  modules selectively enabled per platform instead of enabling all 18
- Rename demo store Orion → WizaTech to avoid confusion with app name
- Fix false "already exist" warnings for customers/products in seed
  (broken post-flush id detection replaced with simple counter)
- Make dev port use API_PORT from .env instead of hardcoded 9999
- Add platforms section with dev URLs to init-prod summary
- Add merchant panel and customer login URLs to seed next steps
- Merge alembic heads (z_store_domain_platform_id + tenancy_001)

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

alembic/versions/a44f4956cfb1_merge_heads.py

@@ -0,0 +1,26 @@
+"""merge heads
+
+Revision ID: a44f4956cfb1
+Revises: z_store_domain_platform_id, tenancy_001
+Create Date: 2026-02-17 16:10:36.287976
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = 'a44f4956cfb1'
+down_revision: Union[str, None] = ('z_store_domain_platform_id', 'tenancy_001')
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    pass
+
+
+def downgrade() -> None:
+    pass