Initial import: shopdb-flask multi-site asset platform

Flask + Vue rewrite of the classic-ASP shopdb, built as a plugin
framework so sister GE Aerospace sites can adopt it. Product version
0.7.0-pre-0.8.0, plugin contract 0.11.0, 966 backend tests.

Key entry points:
- docs/INSTALL-WINDOWS-IIS.md - tested Windows + IIS install runbook
  (own-site and subpath deployment methods)
- docs/PILOT-DEPLOY.md - production pilot: stand up + import + verify
- docs/IMPORT-API.md - schema-agnostic legacy data import contract
- scripts/site_imports/wjf/ - West Jefferson reference import loader
- docs/adr/ - twelve accepted architecture decision records

migrations/versions/7d12_drop_computer_isshopfloor.py

@@ -0,0 +1,26 @@
+"""Drop computers.isshopfloor (redundant with the Shopfloor PC type)
+
+The flag was never populated (0 rows) and duplicated the 'Shopfloor' computer
+type. Shopfloor classification now lives entirely in computertype.
+
+Revision ID: 7d12_drop_isshopfloor
+Revises: 7d11_locationtype_color
+Create Date: 2026-07-09
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = '7d12_drop_isshopfloor'
+down_revision = '7d11_locationtype_color'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.drop_column('computers', 'isshopfloor')
+
+
+def downgrade():
+    op.add_column('computers', sa.Column('isshopfloor', sa.Boolean(), nullable=True, server_default='0'))