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

shopdb/plugins/templates/README.md.tmpl

@@ -0,0 +1,43 @@
+# $Name plugin
+
+$description
+
+This plugin was generated by `flask plugin new $name`. It satisfies the framework contract out of the box. Replace the example model and routes with your domain.
+
+## What's here
+
+- `plugin.py` - the `${Name}Plugin` class extending `BasePlugin`. Edit `init_app` for custom setup, `on_install` to seed reference data.
+- `models/$name.py` - example Asset extension table. Replace `examplefield` with your domain fields.
+- `api/routes.py` - example list and detail endpoints. Add CRUD as needed.
+- `schemas/__init__.py` - marshmallow schema stub for request/response validation.
+- `tests/test_plugin.py` - smoke tests asserting contract compliance.
+- `manifest.json` - plugin metadata. Bump `version` on changes; keep `core_version` range broad.
+
+## Common edits
+
+| You want to... | Do this |
+|---|---|
+| Add a hook (search, navigation, dashboard widget) | Override the method in `${Name}Plugin`. See the PLUGIN-HOOKS wiki page. |
+| Accept external collector data | Override `get_collector_schema()` to return a JSON Schema. See ADR-006. |
+| Add another model | Create `models/<other>.py`, export it in `models/__init__.py`, return it in `get_models()`. |
+| Add a CLI command | Override `get_cli_commands()` returning a list of Click commands. |
+
+## Frontend
+
+Vue components for this plugin live under `frontend/src/views/$name/` (per project convention). Backend scaffolding does not generate frontend yet; copy from an existing plugin's view files (e.g., `frontend/src/views/network/`) as a starting point.
+
+## Install and run
+
+```bash
+flask plugin install $name
+flask db migrate -m "Add $name plugin tables"
+flask db upgrade
+pytest plugins/$name/tests/
+```
+
+## References
+
+- the PLUGIN-HOOKS wiki page - canonical hook reference
+- the PLUGIN-QUICKSTART wiki page - 30-minute walkthrough
+- `migrations/adr/ADR-001-asset-as-platform-contract.md` - the platform contract
+- `migrations/adr/ADR-002-plugin-versioning.md` - versioning rules